1.求y=(cos x)^2的微分.2.求y=sin(x^2-1)的微分.

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1.求y=(cosx)^2的微分.2.求y=sin(x^2-1)的微分.1.求y=(cosx)^2的微分.2.求y=sin(x^2-1)的微分.1.求y=(cosx)^2的微分.2.求y=sin(x^

1.求y=(cos x)^2的微分.2.求y=sin(x^2-1)的微分.
1.求y=(cos x)^2的微分.2.求y=sin(x^2-1)的微分.

1.求y=(cos x)^2的微分.2.求y=sin(x^2-1)的微分.
1. d(cosx)^2=2cosx(-sinx)dx=-sin2xdx
2. dsin(x²-1)=cos(x²-1)d(x²-1)=cos(x²-1)×2xdx=2xcos(x²-1)dx

1、-sin2x 2、2xcos(x^2-1)