{"id":26260,"date":"2020-10-31T11:15:19","date_gmt":"2020-10-31T15:15:19","guid":{"rendered":"https:\/\/blog.carlrobitaille.org\/?p=26260"},"modified":"2020-10-31T11:15:22","modified_gmt":"2020-10-31T15:15:22","slug":"visual-proofs-of-trigonometric-identities","status":"publish","type":"post","link":"https:\/\/blog.carlrobitaille.org\/?p=26260","title":{"rendered":"Visual proofs of trigonometric identities"},"content":{"rendered":"\n<figure class=\"wp-block-embed-twitter wp-block-embed is-type-rich is-provider-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">Here&#39;s a visual proof that<br>sin2x = 2sinxcosx<br>cos2x = cos\u00b2x\u2212sin\u00b2x <a href=\"https:\/\/t.co\/vC9jVTsZT1\">pic.twitter.com\/vC9jVTsZT1<\/a><\/p>&mdash; Fermat&#39;s Library (@fermatslibrary) <a href=\"https:\/\/twitter.com\/fermatslibrary\/status\/1322528256185290753?ref_src=twsrc%5Etfw\">October 31, 2020<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed-twitter wp-block-embed is-type-rich is-provider-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"ca\" dir=\"ltr\">Visual proof of the addition formulas<br><br>sin(\u03b1+\u03b2)=sin(\u03b1)cos(\u03b2)+cos(\u03b1)sin(\u03b2)<br><br>cos(\u03b1+\u03b2)=cos(\u03b1)cos(\u03b2)\u2013sin(\u03b1)sin(\u03b2) <a href=\"https:\/\/t.co\/OL7VwEgKZ5\">pic.twitter.com\/OL7VwEgKZ5<\/a><\/p>&mdash; Tam\u00e1s G\u00f6rbe (@TamasGorbe) <a href=\"https:\/\/twitter.com\/TamasGorbe\/status\/1102623356698923010?ref_src=twsrc%5Etfw\">March 4, 2019<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-26260","post","type-post","status-publish","format-standard","hentry","category-mathematiques"],"_links":{"self":[{"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=\/wp\/v2\/posts\/26260","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26260"}],"version-history":[{"count":1,"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=\/wp\/v2\/posts\/26260\/revisions"}],"predecessor-version":[{"id":26261,"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=\/wp\/v2\/posts\/26260\/revisions\/26261"}],"wp:attachment":[{"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26260"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.carlrobitaille.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}