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[函数] 三角函数求值

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Tesla35 Posted 2021-12-4 23:04 |Read mode

$\tan^2\frac{\pi}{7}+\tan^2\frac{2\pi}{7}+\tan^2\frac{3\pi}{7}$要利用方程了？

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色k Posted 2021-12-5 00:05

forum.php?mod=viewthread&tid=6988

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Author| Tesla35 Posted 2021-12-6 22:12

回复 2# 色k

懂了

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