∫ {cos(x/2)[cos(x/2+sin(x/2)]} dx

来源：学生作业帮编辑：灵鹊做题网作业帮分类：数学作业时间：2024/05/21 06:33:50

∫ {cos(x/2)[cos(x/2+sin(x/2)]} dx
cos*sin有公式么?

2sinx*cosx=sin2x
(cosx)^2-(sinx)^2=cos2x.
由第二个又可以推出
1-2(sinx)^2=cos2x
2(cosx)^2-1=cos2x
这个题之用这些就可以做出来了.
自己试试吧.

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