$$ \int \frac{x+\sin x}{1+\cos x} d x= $$
- A$x \cos x+\mathrm{c}$, where c is the constant integration
- B$x \tan x+\mathrm{c}$, where c is the constant integration
- C$x \tan \frac{x}{2}+c$, where $c$ is the constant integration
- D$x \sec ^2 \frac{x}{2}+\mathrm{c}$, where c is the constant integration
✓ Correct answer: C
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