化简sin^4x+sin^2xcos^2x+cos^2x=?(请写过程)
人气：263 ℃ 时间：2020-05-02 05:51:05
解答
x就不写了,原式等于
sin^2(sin^2+cos^2)+cos^2 = sin^2*(1)+cos^2 = sin^2+cos^2 = 1
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