#1
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1. ©Ñ¹ÍÂÙ躹˹éÒ¼ÒÁͧàËç¹·Øè¹ 2 ·Øè¹ ã¹·ÐàÅ´éÇÂÁØÁ¡éÁ 45 ͧÈÒ ààÅÐ 60 ͧÈÒ ¶éÒ·Øè¹·Ñé§ÊͧËèÒ§¡Ñ¹ 220 ¿Øµ ¨§ËÒ¤ÇÒÁÊÙ§¢Í§Ë¹éÒ¼Ò
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#2
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á·¹ ÊÙµÃàÅ ¤ÃѺ (¾ÔÊÙ¨¹ìàËÁ×͹·Ó»¡µÔàŤÃѺ)
$h = \frac{s}{\cot\theta-\cot\alpha} $ $h= \frac{220}{\sqrt{2}-\frac{1}{\sqrt{3}}}$ 20 ÁԶعÒ¹ 2012 23:58 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ Euler-Fermat |
#3
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$\frac{x}{x-220} = tan 60^\circ = \sqrt{3} $ $x = 110(3+\sqrt{3} ) \ $¿Øµ
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ÁÒËÒ¤ÇÒÁÃÙéäÇéµÔÇËÅÒ¹ áµèËÅÒ¹äÁèàÍÒàÅ¢áÅéÇ à¢éÒÁÒ·ÓàÅ¢àÍÒÁѹÍÂèÒ§à´ÕÂÇ ¤ÇÒÁÃÙéà»ç¹ÊÔè§à´ÕÂÇ·ÕèÂÔè§ãËé ÂÔè§ÁÕÁÒ¡ ÃÙéÍÐäÃäÁèÊÙé ÃÙé¨Ñ¡¾Í (¡àÇ鹤ÇÒÁÃÙé äÁèµéͧ¾Í¡çä´é ËÒäÇéÁÒ¡æáËÅдÕ) (áµè¡çÍÂèÒãËéÁÒ¡¨¹·èÇÁËÑÇ àÍÒµÑÇäÁèÃÍ´) |
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