{"id":132657,"date":"2021-08-17T16:24:01","date_gmt":"2021-08-17T15:24:01","guid":{"rendered":"https:\/\/groupe-reussite.fr\/?page_id=132657"},"modified":"2024-10-28T15:29:19","modified_gmt":"2024-10-28T14:29:19","slug":"cp-qu-est-ce-que-trigonometrie","status":"publish","type":"page","link":"https:\/\/groupe-reussite.fr\/ressources\/cp-qu-est-ce-que-trigonometrie\/","title":{"rendered":"Qu&rsquo;est-ce que la trigonom\u00e9trie en math\u00e9matiques ?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"132657\" class=\"elementor elementor-132657\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\n\t\t<script type=\"text\/javascript\">\n\t\t\tjQuery(document).ready(function() {\n\n\t\t\t\tjQuery(\".elementor-element-6fe69c56\").prepend('<div class=\"aepro-section-bs\"><div class=\"aepro-section-bs-inner\"><\/div><\/div>');\n\t\t\t\tvar bgimage = '';\n\t\t\t\tif ('yes' == 'yes') {\n\n\t\t\t\t\t\/\/if(bgimage == ''){\n\t\t\t\t\t\/\/    var bgoverlay = '';\n\t\t\t\t\t\/\/}else{\n\t\t\t\t\tvar bgoverlay = 'https:\/\/groupe-reussite.fr\/ressources\/wp-content\/plugins\/anywhere-elementor-pro\/includes\/assets\/lib\/vegas\/overlays\/00.png';\n\t\t\t\t\t\/\/ }\n\t\t\t\t} else {\n\t\t\t\t\tif ('') {\n\t\t\t\t\t\tvar bgoverlay = 'https:\/\/groupe-reussite.fr\/ressources\/wp-content\/plugins\/anywhere-elementor-pro\/includes\/assets\/lib\/vegas\/overlays\/.png';\n\t\t\t\t\t} else {\n\t\t\t\t\t\tvar bgoverlay = 'https:\/\/groupe-reussite.fr\/ressources\/wp-content\/plugins\/anywhere-elementor-pro\/includes\/assets\/lib\/vegas\/overlays\/00.png';\n\t\t\t\t\t}\n\t\t\t\t}\n\n\n\t\t\t\tjQuery(\".elementor-element-6fe69c56\").children('.aepro-section-bs').children('.aepro-section-bs-inner').vegas({\n\t\t\t\t\tslides: [{\"src\":\"https:\\\/\\\/groupe-reussite.fr\\\/ressources\\\/wp-content\\\/uploads\\\/2017\\\/11\\\/stage-maths-sup-spe-banniere-3.jpg\"}],\n\t\t\t\t\ttransition: 'fade',\n\t\t\t\t\tanimation: 'kenburns',\n\t\t\t\t\toverlay: bgoverlay,\n\t\t\t\t\tcover: true,\n\t\t\t\t\tdelay: 5000,\n\t\t\t\t\ttimer: true\t\t\t\t});\n\t\t\t\tif ('yes' == 'yes') {\n\t\t\t\t\tjQuery(\".elementor-element-6fe69c56\").children('.aepro-section-bs').children('.aepro-section-bs-inner').children('.vegas-overlay').css('background-image', '');\n\t\t\t\t}\n\t\t\t});\n\t\t<\/script>\n\t\t\t\t<section class=\"has_ae_slider elementor-section elementor-top-section elementor-element elementor-element-6fe69c56 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default ae-bg-gallery-type-default\" data-id=\"6fe69c56\" data-element_type=\"section\" id=\"header_height\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-75db7b60 ae-bg-gallery-type-default\" data-id=\"75db7b60\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-711e6392 elementor-widget elementor-widget-heading\" data-id=\"711e6392\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Qu'est-ce que la trigonom\u00e9trie en math\u00e9matiques ?<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a6c4711 elementor-widget elementor-widget-heading\" data-id=\"3a6c4711\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">D\u00e9couvrir les r\u00e8gles trigonom\u00e9triques en math\u00e9matiques<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-317fa871 elementor-widget elementor-widget-text-editor\" data-id=\"317fa871\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>\t\t<div data-elementor-type=\"section\" data-elementor-id=\"112236\" class=\"elementor elementor-112236\">\n\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t<section class=\"has_ae_slider elementor-section elementor-inner-section elementor-element elementor-element-3afd4a44 elementor-section-content-bottom elementor-section-full_width elementor-section-height-min-height elementor-section-height-default ae-bg-gallery-type-default\" data-id=\"3afd4a44\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-51e605aa ae-bg-gallery-type-default\" data-id=\"51e605aa\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-10432e4c elementor-align-center elementor-widget elementor-widget-button\" data-id=\"10432e4c\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"https:\/\/groupe-reussite.fr\/cours-particuliers\/maths\/tous-niveaux\/france\/\" target=\"_blank\" class=\"elementor-button-link elementor-button elementor-size-md elementor-animation-grow\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t<span class=\"elementor-button-icon elementor-align-icon-right\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-bookmark\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Cours particuliers maths<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"has_ae_slider elementor-section elementor-top-section elementor-element elementor-element-2305ac68 elementor-section-full_width sticky_page elementor-section-height-default elementor-section-height-default ae-bg-gallery-type-default\" data-id=\"2305ac68\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-35198305 col_height ae-bg-gallery-type-default\" data-id=\"35198305\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<section class=\"has_ae_slider elementor-section elementor-inner-section elementor-element elementor-element-2197c53 elementor-section-content-middle wrap elementor-section-boxed elementor-section-height-default elementor-section-height-default ae-bg-gallery-type-default\" data-id=\"2197c53\" data-element_type=\"section\" id=\"sticky_sidebar\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-6fbd9567 hide_col ae-bg-gallery-type-default\" data-id=\"6fbd9567\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-6991ab73 strick_col ae-bg-gallery-type-default\" data-id=\"6991ab73\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5d48515d elementor-widget elementor-widget-image\" data-id=\"5d48515d\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"300\" height=\"210\" src=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2020\/03\/cours-particuliers.jpg\" class=\"attachment-large size-large wp-image-44782\" alt=\"cours-particulier-paris\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b7cd6dc elementor-widget elementor-widget-heading\" data-id=\"3b7cd6dc\" data-element_type=\"widget\" id=\"cat_name\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Cours particuliers<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1849402b elementor-widget elementor-widget-heading\" data-id=\"1849402b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Cours particuliers de maths<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-242132dc elementor-align-center elementor-widget elementor-widget-button\" data-id=\"242132dc\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"https:\/\/groupe-reussite.fr\/cours-particuliers\/maths\/tous-niveaux\/france\/\" target=\"_blank\" class=\"elementor-button-link elementor-button elementor-size-sm\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">r\u00e9server un cours particulier de maths<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db0b061 elementor-align-justify elementor-widget elementor-widget-button\" data-id=\"db0b061\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"https:\/\/groupe-reussite.fr\/nous-contacter\/\" class=\"elementor-button-link elementor-button elementor-size-sm\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">CONTACTEZ  NOUS<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-66 elementor-top-column elementor-element elementor-element-12987e37 section_width ae-bg-gallery-type-default\" data-id=\"12987e37\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<section class=\"has_ae_slider elementor-section elementor-inner-section elementor-element elementor-element-1e473da0 elementor-section-content-middle full_width elementor-section-boxed elementor-section-height-default elementor-section-height-default ae-bg-gallery-type-default\" data-id=\"1e473da0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-240e788 ae-bg-gallery-type-default\" data-id=\"240e788\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-44fc948 elementor-widget elementor-widget-text-editor\" data-id=\"44fc948\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><strong>La trigonom\u00e9trie<\/strong> est souvent per\u00e7ue, \u00e0 tort ou \u00e0 raison, comme difficile. De nouvelles fonctions aux noms intrigants, sinus, cosinus ou tangente notamment, sont introduites. Qu\u2019en est-il r\u00e9ellement ?<\/p><p>D\u00e9couvrez les <a href=\"https:\/\/groupe-reussite.fr\/cours-particuliers\/maths\/tous-niveaux\/france\/\">professeurs de maths particuliers<\/a> chez Groupe R\u00e9ussite pour comprendre et appliquer les r\u00e8gles trigonom\u00e9triques et <a href=\"https:\/\/groupe-reussite.fr\/ressources\/reussir-en-maths\/\">r\u00e9ussir en maths<\/a>.<\/p><p><span style=\"font-size: 14px\">\t\t<div data-elementor-type=\"section\" data-elementor-id=\"186409\" class=\"elementor elementor-186409\">\n\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t<section class=\"has_ae_slider elementor-section elementor-inner-section elementor-element elementor-element-208557d4 elementor-section-content-bottom full_width elementor-section-full_width elementor-section-height-min-height elementor-section-height-default ae-bg-gallery-type-default\" data-id=\"208557d4\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;gradient&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-narrow\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-5c1307a9 ae-bg-gallery-type-default\" data-id=\"5c1307a9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a42a1b elementor-widget elementor-widget-heading\" data-id=\"a42a1b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">AVOIR LES MEILLEURS PROFS DE MATHS<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-53b6892b elementor-widget elementor-widget-heading\" data-id=\"53b6892b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">C&rsquo;est gagner en autonomie<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-339aefc1 elementor-align-left elementor-mobile-align-center elementor-widget elementor-widget-button\" data-id=\"339aefc1\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"https:\/\/groupe-reussite.fr\/cours-particuliers\/maths\/tous-niveaux\/france\/\" target=\"_blank\" class=\"elementor-button-link elementor-button elementor-size-md\" role=\"button\" id=\"CTA_PRD_CP\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Cours de maths particulier<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-461d5d63 ae-bg-gallery-type-default\" data-id=\"461d5d63\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7be8b314 elementor-widget elementor-widget-text-editor\" data-id=\"7be8b314\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h2>Quelle est l&rsquo;histoire de la trigonom\u00e9trie ?\u00a0<\/h2>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b48048 elementor-widget elementor-widget-text-editor\" data-id=\"4b48048\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Le mot <strong>trigonom\u00e9trie<\/strong> est issu des termes grecs <em>trigonos<\/em> (triangle, triangulaire) et<em> m\u00e9tron<\/em> (mesure). <strong>La trigonom\u00e9trie<\/strong> est donc <strong>une discipline mesurant diff\u00e9rents \u00e9l\u00e9ments remarquables du triangle, comme les angles ou les c\u00f4t\u00e9s.<\/strong> On trouve des traces de <strong>la trigonom\u00e9trie<\/strong> dans les civilisations \u00e9gyptiennes, babyloniennes. La fonction sinus est utilis\u00e9e pour la premi\u00e8re fois dans les Sulba-Sutras, \u00e9crites entre le VIIIe et le Ve si\u00e8cle avant J-C. Il s\u2019agit de textes posant les premi\u00e8res r\u00e8gles math\u00e9matiques.<\/p><p>L\u2019objectif de la trigonom\u00e9trie \u00e0 ses d\u00e9buts \u00e9tait de r\u00e9soudre des probl\u00e8mes pratiques. Ainsi, <strong>les fonctions trigonom\u00e9triques<\/strong> ont \u00e9t\u00e9 cr\u00e9\u00e9es pour aider les astronomes ou les marins. En effet, la mesure des angles et des c\u00f4t\u00e9s d\u2019un triangle s\u2019av\u00e8re n\u00e9cessaire pour estimer, par exemple, la distance restante pour arriver au port.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-850f199 elementor-widget elementor-widget-image\" data-id=\"850f199\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"600\" height=\"400\" src=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/description-trigonometrie.jpg\" class=\"attachment-medium_large size-medium_large wp-image-132893\" alt=\"D\u00e9finition de la trigonom\u00e9trie\" loading=\"lazy\" srcset=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/description-trigonometrie.jpg 600w, https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/description-trigonometrie-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f9138af elementor-widget elementor-widget-text-editor\" data-id=\"3f9138af\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Comme souvent dans <a href=\"https:\/\/groupe-reussite.fr\/ressources\/cp-histoire-maths\/\">l&rsquo;histoire des math\u00e9matiques<\/a>, les Grecs vont synth\u00e9tiser et enrichir les savoirs sur <strong>la trigonom\u00e9trie.<\/strong> Les plus <a href=\"https:\/\/groupe-reussite.fr\/ressources\/cp-les-plus-grands-mathematiciens-au-monde\/\">grands math\u00e9maticiens au monde<\/a> vont y jouer un r\u00f4le. Le math\u00e9maticien Hipparque de Nic\u00e9e fut le premier \u00e0 utiliser des tables trigonom\u00e9triques. Gr\u00e2ce \u00e0 celles-ci, il r\u00e9ussit \u00e0 estimer la distance entre le Soleil et la Lune et leurs tailles<strong>.<\/strong><\/p><p>Ptol\u00e9m\u00e9e d\u2019Alexandrie les red\u00e9couvre et les publie vers le IIe si\u00e8cle apr\u00e8s J-C. Il les utilise pour <strong>calculer la trajectoire des plan\u00e8tes.<\/strong> Toutefois, il ne croit pas \u00e0 l\u2019h\u00e9liocentrisme (l\u2019id\u00e9e que la Terre tourne autour du Soleil), au contraire de Pythagore. Cette \u201cerreur\u201d fausse en grande partie ses calculs.<\/p><p>Apr\u00e8s la p\u00e9riode grecque, ce fut principalement en Orient que <strong>la trigonom\u00e9trie<\/strong> se d\u00e9veloppa. Ce sont <strong>des math\u00e9maticiens arabes<\/strong> tels Abu-I-Wafa ou Omar Khayyam qui<strong> \u00e9mancipent la trigonom\u00e9trie de l\u2019astronomie<\/strong> en instituant des formules de trigonom\u00e9trie comparables aux n\u00f4tres.<\/p><p><strong>La trigonom\u00e9trie<\/strong> est red\u00e9couverte en Europe, surtout \u00e0 partir de la Renaissance, avec des math\u00e9maticiens comme Adrien Romain qui introduit la notation sin ou Bartholom\u00e4us Pitiscus qui publie un ouvrage sur la trigonom\u00e9trie intitul\u00e9 <em>Trigonometria<\/em> en 1595, donnant ainsi son nom \u00e0 la discipline.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2412f8b elementor-widget elementor-widget-text-editor\" data-id=\"2412f8b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h2>Comment peut-on d\u00e9finir la trigonom\u00e9trie ?<\/h2>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-706448a elementor-widget elementor-widget-text-editor\" data-id=\"706448a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><strong>La trigonom\u00e9trie<\/strong> est une branche des math\u00e9matiques, tout comme <a href=\"https:\/\/groupe-reussite.fr\/ressources\/cp-qu-est-ce-que-algebre\/\">l&rsquo;alg\u00e8bre<\/a>, l\u2019analyse ou encore les probabilit\u00e9s. Il s\u2019agit d\u2019un champ des math\u00e9matiques qui <strong>fait le lien entre la mesure des angles des triangles rectangles et la longueur de leurs c\u00f4t\u00e9s.<\/strong> <strong>La trigonom\u00e9trie<\/strong> est donc intimement li\u00e9e \u00e0 la <a href=\"https:\/\/groupe-reussite.fr\/ressources\/cp-qu-est-ce-que-geometrie\/\">g\u00e9om\u00e9trie<\/a>.\u00a0<\/p><p><strong>La trigonom\u00e9trie<\/strong> a pour objectif de simplifier la r\u00e9solution de probl\u00e8mes g\u00e9om\u00e9triques. En effet, <strong>l\u2019utilisation de formules trigonom\u00e9triques<\/strong> permet de :\u00a0<\/p><ul><li><strong>Calculer la longueur d\u2019un c\u00f4t\u00e9 d\u2019un triangle rectangle<\/strong> lorsqu\u2019on conna\u00eet la longueur d\u2019un c\u00f4t\u00e9 et les mesures d\u2019au moins 2 angles.<\/li><li><strong>Calculer les mesures des 2 autres angles que l\u2019angle droit d\u2019un triangle rectangle<\/strong> en connaissant les longueurs d\u2019au moins 2 c\u00f4t\u00e9s.<\/li><\/ul><p>Pour cela, on utilise <strong>des fonctions trigonom\u00e9triques.<\/strong> Les principales sont <strong>la fonction cosinus<\/strong> (ou <strong>cos<\/strong>),<strong> la fonction sinus<\/strong> (ou <strong>sin<\/strong>) et <strong>la fonction tangente<\/strong> (ou <strong>tan<\/strong>).<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e5093f4 elementor-widget elementor-widget-image\" data-id=\"e5093f4\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"656\" height=\"327\" src=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/abc.png\" class=\"attachment-medium_large size-medium_large wp-image-132658\" alt=\"Triangle rectangle\" loading=\"lazy\" srcset=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/abc.png 656w, https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/abc-300x150.png 300w\" sizes=\"(max-width: 656px) 100vw, 656px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-028ebca elementor-widget elementor-widget-text-editor\" data-id=\"028ebca\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Soit ABC un triangle rectangle en C,<\/p>\n<p>On a alors<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f7bb673 elementor-widget elementor-widget-image\" data-id=\"f7bb673\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"300\" height=\"193\" src=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/trigon-300x193.png\" class=\"attachment-medium size-medium wp-image-132659\" alt=\"formules simples de trigonometrie\" loading=\"lazy\" srcset=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/trigon-300x193.png 300w, https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/trigon.png 387w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8420a2d elementor-widget elementor-widget-text-editor\" data-id=\"8420a2d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Pour se souvenir de ces formules, on peut retenir ceci.<\/p><p><strong>SOH CAH TOA<\/strong> (Sinus Oppos\u00e9 Hypot\u00e9nuse, Cosinus Adjacent Hypot\u00e9nuse, Tangente Oppos\u00e9 Adjacent).<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1a6045 elementor-widget elementor-widget-text-editor\" data-id=\"f1a6045\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h2>Les formules g\u00e9n\u00e9rales de trigonom\u00e9trie<\/h2>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-360e7bb elementor-widget elementor-widget-text-editor\" data-id=\"360e7bb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><strong>Les fonctions trigonom\u00e9triques<\/strong> peuvent \u00eatre utilis\u00e9es en math\u00e9matiques. Il est donc possible <strong>de d\u00e9river ou d\u2019int\u00e9grer des fonctions trigonom\u00e9triques.<\/strong> Dans ce cas, il s\u2019av\u00e8re n\u00e9cessaire d\u2019utiliser les radians, seule la valeur en radian ayant un sens math\u00e9matique.<\/p><p>On peut utiliser ce tableau de conversion pour obtenir la valeur en radian d\u2019une valeur en degr\u00e9.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1b1af43 elementor-widget elementor-widget-image\" data-id=\"1b1af43\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"1013\" height=\"214\" src=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/tableau-conversion.png\" class=\"attachment-large size-large wp-image-132660\" alt=\"Tableau de conversion degr\u00e9s radians en trigonom\u00e9trie\" loading=\"lazy\" srcset=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/tableau-conversion.png 1013w, https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/tableau-conversion-300x63.png 300w, https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/tableau-conversion-768x162.png 768w\" sizes=\"(max-width: 1013px) 100vw, 1013px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c4dba4 elementor-widget elementor-widget-text-editor\" data-id=\"8c4dba4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Quelques <strong>formules utiles en trigonom\u00e9trie<\/strong>, valables pour n\u2019importe quel a, b et x :<\/p><ul><li>cos\u00b2(x)+sin\u00b2(x) = 1<\/li><li>cos(a + b) = cos(a)<\/li><li>cos(b) \u2212 sin(a) sin(b)<\/li><li>sin(a + b) = sin(a) cos(b) + cos(a) sin(b)<\/li><li>tan(x) = sin(x)\/cos(x)<\/li><li>cos(x + 2\u03c0) = cos(x)<\/li><li>sin(x + 2\u03c0) = sin(x)<\/li><li>tan(x + \u03c0) = tan(x)<\/li><li>cos(2x) = 2cos\u00b2(x)-1<\/li><li>sin(2x) = 2sin(x)cos(x)<\/li><\/ul><p>On peut retenir les d\u00e9riv\u00e9es des fonctions sinus, cosinus pour n\u2019importe quel x :<\/p><ul><li>cos\u2019(x) = -sin(x)<\/li><li>sin\u2019(x) = cos(x)<\/li><\/ul><p>On a aussi la d\u00e9riv\u00e9e de la fonction tangente pour x qui n\u2019est pas sous la forme \u03c0\/2+k\u03c0, k \u00e9tant un entier relatif :<\/p><ul><li>tan\u2019(x) = 1\/cos\u00b2(x)<\/li><\/ul>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45fb020 elementor-widget elementor-widget-text-editor\" data-id=\"45fb020\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h2>Utiliser ces fonctions dans la r\u00e9solution de probl\u00e8mes g\u00e9om\u00e9triques<\/h2>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2560f7 elementor-widget elementor-widget-text-editor\" data-id=\"f2560f7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"font-weight: 400\">On peut utiliser<\/span><b> les fonctions trigonom\u00e9triques<\/b><span style=\"font-weight: 400\"> pour mesurer le degr\u00e9 d\u2019un angle ou pour calculer la longueur d\u2019un c\u00f4t\u00e9<\/span><b>.<\/b><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-363ce8d blacktitle elementor-widget elementor-widget-text-editor\" data-id=\"363ce8d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h3>Comment trouver une longueur avec la trigonom\u00e9trie ?<\/h3>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-365698e elementor-widget elementor-widget-text-editor\" data-id=\"365698e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><strong>Exemple d\u2019un exercice sur la trigonom\u00e9trie.<\/strong><\/p><p>Soit le m\u00eame triangle qu\u2019au-dessus ABC rectangle en C.<br \/>On pose AC = 5 cm et l\u2019angle A est de degr\u00e9 25 et est not\u00e9 \u00e2.<\/p><p>On cherche une valeur approch\u00e9e de AB.<\/p><p>Dans cette situation, le triangle est rectangle en C. On peut donc utiliser les formules trigonom\u00e9triques.<\/p><p>Ici, on cherche une valeur de AB.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1800f38 elementor-widget elementor-widget-image\" data-id=\"1800f38\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"209\" height=\"300\" src=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/calcul-trigonometrie-maths.png\" class=\"attachment-medium size-medium wp-image-132921\" alt=\"calcul d&#039;une longueur avec la trigonometrie\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2cafccd blacktitle elementor-widget elementor-widget-text-editor\" data-id=\"2cafccd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h3>Comment trouver la valeur d&rsquo;un angle avec la trigonom\u00e9trie ?<\/h3>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ecd45b0 elementor-widget elementor-widget-text-editor\" data-id=\"ecd45b0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Soit le m\u00eame triangle ABC rectangle en C.<\/p><p>On pose AC = 5 cm et BC = 2 cm (on ne s\u2019occupe pas de AB).<\/p><p>On souhaite calculer l\u2019angle de B.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cfb0e1a elementor-widget elementor-widget-image\" data-id=\"cfb0e1a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"165\" height=\"99\" src=\"https:\/\/groupe-reussite.fr\/ressources\/wp-content\/uploads\/2021\/08\/calcul-trigonometrie-angle.png\" class=\"attachment-medium size-medium wp-image-132669\" alt=\"usage de la trigonom\u00e9trie pour calculer un angle\" loading=\"lazy\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09fe0db elementor-widget elementor-widget-text-editor\" data-id=\"09fe0db\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Pour trouver la valeur de l&rsquo;angle B, on utilise la touche tan-1 sur la calculatrice pour 2,5.<\/p><p>On trouve alors un angle d&rsquo;environ 68\u00b0.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2258422 elementor-widget elementor-widget-text-editor\" data-id=\"2258422\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h2>Importance de la trigonom\u00e9trie \u00e0 l&rsquo;\u00e9cole<\/h2>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f0efce9 elementor-widget elementor-widget-text-editor\" data-id=\"f0efce9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p style=\"text-align: justify\"><strong>La trigonom\u00e9trie<\/strong> est abord\u00e9e pour la premi\u00e8re fois en classe de Troisi\u00e8me. En Troisi\u00e8me, on utilise <strong>la trigonom\u00e9trie<\/strong> surtout pour <strong>calculer le degr\u00e9 des angles<\/strong> ou la <strong>longueur d\u2019un des c\u00f4t\u00e9s.<\/strong> Les exercices sur la trigonom\u00e9trie portent principalement sur la r\u00e9solution de probl\u00e8mes g\u00e9om\u00e9triques. En Seconde, l\u2019introduction de la notion du <strong>cercle trigonom\u00e9trique<\/strong> permet d\u2019utiliser plus largement cette derni\u00e8re.<\/p><p style=\"text-align: justify\">En particulier, il permet de calculer tr\u00e8s simplement des valeurs remarquables de certains cosinus ou sinus. Ensuite, pour <strong>poursuivre l\u2019apprentissage de la trigonom\u00e9trie,<\/strong> il faut suivre la sp\u00e9cialit\u00e9 math\u00e9matiques en Premi\u00e8re. \u00c0 partir de ce moment-l\u00e0, <strong>la trigonom\u00e9trie<\/strong> n\u2019est plus \u00e9tudi\u00e9e exclusivement en lien avec la g\u00e9om\u00e9trie. En effet, les \u00e9l\u00e8ves apprennent par exemple \u00e0 d\u00e9river ou int\u00e9grer des fonctions trigonom\u00e9triques.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-72c1373 elementor-widget elementor-widget-text-editor\" data-id=\"72c1373\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h2>\u00c0 quoi sert la trigonom\u00e9trie ?<\/h2>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2006629 elementor-widget elementor-widget-text-editor\" data-id=\"2006629\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p style=\"text-align: justify\"><strong>La trigonom\u00e9trie<\/strong> a un r\u00f4le central dans notre vie quotidienne et pas seulement en raison de <a href=\"https:\/\/groupe-reussite.fr\/ressources\/cp-limportance-des-maths-dans-le-systeme-francais\/\">l&rsquo;importance des maths dans le syst\u00e8me scolaire<\/a> et de <a href=\"https:\/\/groupe-reussite.fr\/ressources\/cp-maths-dans-enseignement\/\">la place des maths dans l&rsquo;enseignement<\/a>. <strong>La trigonom\u00e9trie<\/strong> est utilis\u00e9e dans de tr\u00e8s nombreuses activit\u00e9s, m\u00eame si les calculs se font en g\u00e9n\u00e9ral par ordinateur, par du codage informatique. Comme autrefois, <strong>la trigonom\u00e9trie<\/strong> peut \u00eatre employ\u00e9e en navigation. En effet, elle permet de calculer la distance dans un triangle et donc la distance s\u00e9parant un bateau d\u2019un rivage par exemple.<\/p><p style=\"text-align: justify\">En climatologie ou en sciences \u00e9conomiques, l\u2019\u00e9tude des p\u00e9riodicit\u00e9s saisonni\u00e8res n\u00e9cessite l\u2019emploi des <strong>fonctions sinus ou cosinus.<\/strong> Plus \u00e9tonnant encore, <strong>la trigonom\u00e9trie<\/strong> est aussi pr\u00e9sente dans l\u2019univers de <strong>la musique.<\/strong> Gr\u00e2ce \u00e0 la <strong>trigonom\u00e9trie, Pythagore<\/strong> a montr\u00e9 que les sons obtenus en pin\u00e7ant 2 cordes de longueurs diff\u00e9rentes sont d\u2019autant plus harmonieux que les 2 longueurs sont de petits multiples.<\/p><p style=\"text-align: justify\">Un musicien n\u2019a pas besoin de <strong>conna\u00eetre la trigonom\u00e9trie<\/strong>. Toutefois, il ne pourra pas comprendre ce point sp\u00e9cifique s\u2019il ne ma\u00eetrise pas certaines <strong>r\u00e8gles de trigonom\u00e9trie<\/strong>. La trigonom\u00e9trie a donc bien sa place dans notre vie et dans de nombreux m\u00e9tiers.<\/p><p style=\"text-align: justify\">\t\t<div data-elementor-type=\"section\" data-elementor-id=\"112236\" class=\"elementor elementor-112236\">\n\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t<section class=\"has_ae_slider elementor-section elementor-inner-section elementor-element elementor-element-3afd4a44 elementor-section-content-bottom elementor-section-full_width elementor-section-height-min-height elementor-section-height-default ae-bg-gallery-type-default\" data-id=\"3afd4a44\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"has_ae_slider elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-51e605aa ae-bg-gallery-type-default\" data-id=\"51e605aa\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-10432e4c elementor-align-center elementor-widget elementor-widget-button\" data-id=\"10432e4c\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"https:\/\/groupe-reussite.fr\/cours-particuliers\/maths\/tous-niveaux\/france\/\" target=\"_blank\" class=\"elementor-button-link elementor-button elementor-size-md elementor-animation-grow\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t<span class=\"elementor-button-icon elementor-align-icon-right\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-bookmark\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Cours particuliers maths<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Qu&rsquo;est-ce que la trigonom\u00e9trie en math\u00e9matiques ? D\u00e9couvrir les r\u00e8gles trigonom\u00e9triques en math\u00e9matiques Cours particuliers Cours particuliers de maths r\u00e9server un cours particulier de maths CONTACTEZ NOUS La trigonom\u00e9trie est souvent per\u00e7ue, \u00e0 tort ou \u00e0 raison, comme difficile. De nouvelles fonctions aux noms intrigants, sinus, cosinus ou tangente notamment, sont introduites. Qu\u2019en est-il r\u00e9ellement [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.2.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Trigonom\u00e9trie : les origines, r\u00e8gles et applications<\/title>\n<meta name=\"description\" content=\"Trigonom\u00e9trie : quelles sont les origines de la trigonom\u00e9trie en math\u00e9matiques ? Quelles sont les r\u00e8gles ? 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