\[ \int \frac{(1+\cos x)}{(1-\cos x)} d x=? \] \( \mathrm{P} \) (a)...

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\[
\int \frac{(1+\cos x)}{(1-\cos x)} d x=?
\]
\( \mathrm{P} \)
(a) \( -2 \cot \frac{x}{2}-x+C \)
(b) \( -2 \cot \frac{x}{2}+x+C \)
W
(c) \( 2 \cot \frac{x}{2}+x+C \)
(d) none of these
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