{"id":5148,"date":"2018-05-25T21:40:58","date_gmt":"2018-05-25T13:40:58","guid":{"rendered":"https:\/\/lttt.vanabel.cn\/?p=5148"},"modified":"2018-05-25T21:40:58","modified_gmt":"2018-05-25T13:40:58","slug":"baochimianjidesanjiaoxingzaizhuishangdeyidong","status":"publish","type":"post","link":"https:\/\/lttt.vanabel.cn\/?p=5148","title":{"rendered":"\u4fdd\u6301\u9762\u79ef\u7684\u4e09\u89d2\u5f62\u5728\u9525\u4e0a\u7684\u79fb\u52a8"},"content":{"rendered":"<pre class=\"lang:default decode:true \" >x = 20;\n\\[Alpha] = 30 \\[Degree];\ns = 5;\nmin = 0.1 x;\nmax = 0.5 x;\nlines = Table[\n   r = 2 s\/a\/Sin[\\[Alpha]]; {{a, 0}, {r Cos[\\[Alpha]], \n     r Sin[\\[Alpha]]}}, {a, 0.1, x, 0.5}];\nAnimate[\n \n Graphics[{\n   {Thickness[Large], \n    Line[{{x, 0}, {0, 0}, {x Cos[\\[Alpha]], x Sin[\\[Alpha]]}}]},\n   {Red, Thickness[Large],\n    Line[{{a, 0}, 2 s\/a\/Sin[\\[Alpha]] { Cos[\\[Alpha]], Sin[\\[Alpha]]}}]\n    }\n   }], {{a, 1}, min, max}, AnimationDirection -&gt; ForwardBackward]<\/pre>\n<p><a href=\"https:\/\/lttt.vanabel.cn\/wp-content\/uploads\/2018\/05\/trangle.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lttt.vanabel.cn\/wp-content\/uploads\/2018\/05\/trangle-300x195.gif\" alt=\"\" width=\"300\" height=\"195\" class=\"aligncenter size-medium wp-image-5149\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>x = 20; \\[Alpha] = 30 \\[Degree]; s = 5;  &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"more-link\" href=\"https:\/\/lttt.vanabel.cn\/?p=5148\"> <span class=\"screen-reader-text\">\u4fdd\u6301\u9762\u79ef\u7684\u4e09\u89d2\u5f62\u5728\u9525\u4e0a\u7684\u79fb\u52a8<\/span> \u9605\u8bfb\u66f4\u591a &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[843,548,38,844],"class_list":["post-5148","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-cone","tag-mathematica","tag-38","tag-mianji"],"_links":{"self":[{"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=\/wp\/v2\/posts\/5148","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5148"}],"version-history":[{"count":1,"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=\/wp\/v2\/posts\/5148\/revisions"}],"predecessor-version":[{"id":5150,"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=\/wp\/v2\/posts\/5148\/revisions\/5150"}],"wp:attachment":[{"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5148"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5148"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lttt.vanabel.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}