Indefinite Integration

\(\frac{1}{2} \tan \frac{x}{2}+\mathrm{c}\), where c is a constant of integration.

\(\tan \frac{x}{2}+\mathrm{c}\), where c is a constant of integration.

\(2 \cot \frac{x}{2}+\mathrm{c}\), where c is a constant of integration.

\(\cot \frac{x}{2}+\mathrm{c}\), where c is a constant of integration.