Indefinite Integration

$2 \cos x+2 x \cos \alpha+\mathrm{c}$, where c is the constant of integration.

$2 \cos x-2 x \cos \alpha+\mathrm{c}$, where c is the constant of integration.

$2 \sin x+2 x \cos \alpha+c$, where $c$ is the constant of integration.

$2 \sin x+2 x \sin \alpha+c$, where $c$ is the constant of integration.