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[函数] 三角最值

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957683999 Post time 2014-10-28 12:38 |Read mode

三角最值.JPG

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kuing Post time 2014-10-28 13:15

下确界为0，B=C->90时“取”
最大值遇到四次方程，放弃ing

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kuing Post time 2014-11-4 21:20

这道题哪来的，或者有何背景么？

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