y=sinx^3,则dy/d(x^2)=
问题描述：
y=sinx^3,则dy/d(x^2)=
答
dy = 3x^2 cos x^3 dx
d(x^2) = 2x dx
dy/d(x^2) = 3x^2 cosx^3 dx/(2x dx) = 3x^2 cosx^3 /2x = 1.5x cos x^3