y=sin^2xcos2x (y等于sin的平方x cos2x )的导数
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y=sin^2xcos2x (y等于sin的平方x cos2x )的导数
![y=sin^2xcos2x (y等于sin的平方x cos2x )的导数](/uploads/image/z/17326075-67-5.jpg?t=y%3Dsin%5E2xcos2x+%28y%E7%AD%89%E4%BA%8Esin%E7%9A%84%E5%B9%B3%E6%96%B9x+cos2x+%29%E7%9A%84%E5%AF%BC%E6%95%B0)
y'=2sinx*cosxcos2x+sin^2x*(-sin2x)*(-2x)'
=sin2xcos2x+2sin^2xsin2x
=1/2sin4x+2sin^2xsin2x
=sin2xcos2x+2sin^2xsin2x
=1/2sin4x+2sin^2xsin2x