\[ \int \frac{(\cos 2 x-\cos 2 \alpha)}{(\cos x-\cos \alpha)} d x=?...

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