QuestionFind the integral of $\sin x \sin (\cos x)$ with respect to $x$: $\int \sin x \sin (\cos x) d x$.

Studdy Solution
Finally, we substitute back $u = \cos x$ to get the solution in terms of $x$.
$$-\cos (\cos x) + C$$So, the integral of $\sin x \sin (\cos x)$ with respect to $x$ is $-\cos (\cos x) + C$.