
ԲĺϽǣǴ붥нΪBcot B=2
·ΪAA=2B
εױ߳Ϊa
\(a=8\cot A=8 \cot (2B)=8 \frac{\cot^2B-1}{2\cot B}=8\times 3/4=6\)
=1/268=24.
���༭ʱ��: 2023-03-29 23:21:16
所跟帖: ·®¹ : ÊÔÊÔ£¬Èç¹ûûËã´í 2023-03-29 20:45:40
ƯÁÁ¡£µÚÒ»Ìâ°³ÓÃÈý½Ç¹«Ê½¡£2023-03-29 23:19:48 [点击:1399]
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