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#1
20 ÁԶعÒ¹ 2012, 19:20
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µÃÕ⡳ÁÔµÔ¤ÃѺ
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
20 ÁԶعÒ¹ 2012, 23:57
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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
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#3
21 ÁԶعÒ¹ 2012, 08:07
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$\frac{x}{x-220} = tan 60^\circ = \sqrt{3} $ $x = 110(3+\sqrt{3} ) \ $¿Øµ
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