Turunan dari f (x) = x^2 sin^3 (cos x)? Mohon bantuannya ya ka :)

[tex]\displaystyle f(x)=x^2\sin^3(\cos x)\\\\f'(x)=2x^{2-1}\sin^3(\cos x)+x^2\cdot3\sin^{3-1}(\cos x)\cdot\cos(\cos x)\cdot(-\sin x)\\f'(x)=2x\sin^3(\cos x)-x^2\cdot3\sin^{2}(\cos x)\cos(\cos x)\sin x\\\boxed{\boxed{f'(x)=2x\sin^3(\cos x)-3x^2\sin x\sin^{2}(\cos x)\cos(\cos x)}}[/tex]