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[函数] 一个三角函数恒成立问题

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等待hxh Posted 2014-4-23 21:47 |Read mode

（最近做题没题感，遇到几个三角函数题都没搞定，希望高手帮忙指导！）

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爪机专用 Posted 2014-4-23 22:42

kkkkuingggg.haotui.com/viewthread.php?tid=240

I am majia of kuing

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