化简cos^4x+sin^2xcos^2x+sin^2x

分类: 作业答案 • 2021-12-19 10:55:21

问题描述：

答

cos^4x+sin^2xcos^2x+sin^2x
=cos^4x+(1-cos²x)cos²x+sin²x
=cos^4x+cos²x-cos^4x+sin²x
=cos²x+sin²x
=1