Indefinite Integration

$\frac{1}{4} \sin ^{-1}\left(\frac{\cos ^2 2 x}{2}\right)+\mathrm{c}$, where c is the constant of integration.

$\frac{-1}{4} \sin ^{-1}\left(\frac{\cos ^2 2 x}{2}\right)+\mathrm{c}$, where c is the constant of integration.

$\frac{1}{2} \sin ^{-1}\left(\frac{\cos ^2 2 x}{2}\right)+\mathrm{c}$, where c is the constant of integration.

$\frac{-1}{2} \sin ^{-1}\left(\frac{\cos ^2 2 x}{2}\right)+\mathrm{c}$, where c is the constant of integration.