已知f（x）= 32 sin2x﹣cos2x﹣ 12 ，（x∈R）．_刷题宝

题干

已知f（x）=

3

2

sin2x﹣cos²x﹣

1

2

，（x∈R）．

上一题下一题 0.0难度选择题更新时间:2014-12-08 06:23:52

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