{"id":170,"date":"2012-02-22T13:30:53","date_gmt":"2012-02-22T11:30:53","guid":{"rendered":"http:\/\/www.joanillo.org\/?p=170"},"modified":"2020-09-14T13:31:43","modified_gmt":"2020-09-14T11:31:43","slug":"google-no-lencerta-a-lhora-de-dibuixar-una-funcio-sinus","status":"publish","type":"post","link":"https:\/\/www.joanillo.org\/?p=170","title":{"rendered":"Google no l&#8217;encerta a l&#8217;hora de dibuixar una funci\u00f3 sinus"},"content":{"rendered":"<p><a href=\"http:\/\/www.joanillo.org\/wp-content\/uploads\/2012\/02\/google_hertz.jpg\"><img loading=\"lazy\" src=\"http:\/\/www.joanillo.org\/wp-content\/uploads\/2012\/02\/google_hertz-300x239.jpg\" alt=\"\" title=\"google_hertz\" width=\"300\" height=\"239\" class=\"alignright size-medium wp-image-605\"><\/a>Avui \u00e9s el 155 aniversari del naixement de Heinrich Rudolf <strong>Hertz<\/strong> (155 no \u00e9s un n\u00famero gens significatiu, no tenien res millor que explicar la gent de Google?). Per il\u00b7lustrar-ho han fet una animaci\u00f3 d&#8217;una ona sinuoidal bastant desastrosa. Tot el m\u00f3n sap que la derivada del sinus \u00e9s el cosinus, i que per tant el pendent del sinus en l&#8217;origen val 1,<\/p>\n<blockquote><p>sin'(0) = cos(0) = 1<\/p><\/blockquote>\n<p>Si els eixos x i y tenen la mateixa escala vol dir que el pendent quan la funci\u00f3 sinus creua l&#8217;eix horitzontal ha de ser una recta de 45\u00ba. Com la funci\u00f3 cosinus agafa valors entre -1 i 1, el pendent en qualsevol dels punts no pot ser una recta vertical!!<\/p>\n<p>Vaja, que hi ha gent que per dibuixar ones sinusoidals es dedica a enlla\u00e7ar semicercles&#8230; una mica de cultura matem\u00e0tica si us plau&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avui \u00e9s el 155 aniversari del naixement de Heinrich Rudolf Hertz (155 no \u00e9s un n\u00famero gens significatiu, no tenien res millor que explicar la gent de Google?). Per il\u00b7lustrar-ho han fet una animaci\u00f3 d&#8217;una ona sinuoidal bastant desastrosa. Tot el m\u00f3n sap que la derivada del sinus \u00e9s el cosinus, i que per tant [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"_links":{"self":[{"href":"https:\/\/www.joanillo.org\/index.php?rest_route=\/wp\/v2\/posts\/170"}],"collection":[{"href":"https:\/\/www.joanillo.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.joanillo.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.joanillo.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.joanillo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=170"}],"version-history":[{"count":1,"href":"https:\/\/www.joanillo.org\/index.php?rest_route=\/wp\/v2\/posts\/170\/revisions"}],"predecessor-version":[{"id":171,"href":"https:\/\/www.joanillo.org\/index.php?rest_route=\/wp\/v2\/posts\/170\/revisions\/171"}],"wp:attachment":[{"href":"https:\/\/www.joanillo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.joanillo.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.joanillo.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}