y=sin^2xcos2x (y等于sin的平方x cos2x )的导数

问题描述:

y=sin^2xcos2x (y等于sin的平方x cos2x )的导数

y'=2sinx*cosxcos2x+sin^2x*(-sin2x)*(-2x)'
=sin2xcos2x+2sin^2xsin2x
=1/2sin4x+2sin^2xsin2x