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#1
04 ¡Ã¡®Ò¤Á 2011, 19:54
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µÃÕ⡳¤ÃѺ
$1sin^2 1^{\circ} + 2sin^2 2^{\circ} + 3sin^2 3^{\circ} + 4sin^2 4^{\circ} +...+180sin^2 180^{\circ} $
ËÒ¤èÒã¹ÃÙ»ÍÂèÒ§§èÒ¤ÃѺ 04 ¡Ã¡®Ò¤Á 2011 19:55 : ¢éͤÇÒÁ¹Õé¶Ù¡á¡éä¢áÅéÇ 1 ¤ÃÑé§, ¤ÃÑé§ÅèÒÊØ´â´Â¤Ø³ CHAOS 
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