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à¤Ã×èͧÁ×ͧ͢ËÑÇ¢éÍ | ¤é¹ËÒã¹ËÑÇ¢é͹Õé |
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#1
21 ÊÔ§ËÒ¤Á 2008, 19:39
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ÁѹÁÒÂѧ䧤ÃѺ(µÃÕ⡳)
¨Ò¡$(tan91ͧÈÒ\bullet tan179ͧÈÒ )(tan92ͧÈÒ \bullet tan178ͧÈÒ)\bullet ..\bullet (tan134ͧÈÒ\bullet tan136ͧÈÒ)\bullet tan135ͧÈÒ$
¡ÅÒÂà»ç¹ $([-cot1ͧÈÒ]\bullet[-tan1ͧÈÒ])([-cot2ͧÈÒ])\bullet [-tan2ͧÈÒ])\bullet ..\bullet ([-cot44ͧÈÒ]\bullet [-tan44ͧÈÒ])\bullet tan135ͧÈÒ$ ä´éÍÂèÒ§ääÃѺ  -------------------------------------------------------------------------------------- ÍÕ¡¢é͹֧ ¨ÐËÒ$tan4ͧÈÒ\bullet tan6ͧÈÒ\bullet ....\bullet tan88ͧÈÒ $ ¡ÅÒÂà»ç¹ $\frac{tan2ͧÈÒ}{tan2ͧÈÒ}\bullet tan4ͧÈÒ\bullet tan6ͧÈÒ\bullet ....\bullet tan88ͧÈÒ$ áÅéÇ¡ÅÒÂà»ç¹ $\frac{1}{tan2ͧÈÒ}=cot2ͧÈÒ$ ä´é䧤ÃѺ
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21 ÊÔ§ËÒ¤Á 2008 19:57 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 5 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ gateway 
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#2
21 ÊÔ§ËÒ¤Á 2008, 19:57
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ÁѹÁÒ¨Ò¡ $\tan (90^\circ+\theta)=-\cot \theta$ ¤ÃѺ àÇÅÒ´Ù·ÕèÁÒ¡ç´Ù¨Ò¡ Unit circle ¤ÃѺ
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¤¹ä·ÂÃèÇÁã¨ÍÂèÒãªéÀÒÉÒÇÔºÑµÔ ½Ö¡¾ÔÁ¾ìÊÑÅѡɳìÊÑ¡¹Ô´ ªÕÇÔµ(¤¹µÍºáÅФ¹¶ÒÁ)¨Ð§èÒ¢Öé¹àÂÍÐ (¨ÃÔ§æ¹Ð) Stay Hungry. Stay Foolish.
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