Calculus: Early Transcendentals 8th Edition

$f'(x)=x^{2}\cos x+2x\sin x$
$f(x)=x^{2}\sin x$ Differentiate using the product rule: $f'(x)=(x^{2})(\sin x)'+(\sin x)(x^{2})'=x^{2}\cos x+2x\sin x$