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数学
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化简cos^4x+sin^2xcos^2x+sin^2x
人气:401 ℃ 时间:2020-01-30 11:23:06
解答
cos^4x+sin^2xcos^2x+sin^2x
=cos^4x+(1-cos²x)cos²x+sin²x
=cos^4x+cos²x-cos^4x+sin²x
=cos²x+sin²x
=1
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