\( \int \frac{\cos 2 x-\cos 2 \theta}{\cos x-\cos \theta} d x \) is...
\( \int \frac{\cos 2 x-\cos 2 \theta}{\cos x-\cos \theta} d x \) is equal to
(A) \( 2(\sin x+x \cos \theta)+C \)
(B) \( 2(\sin x-x \cos \theta)+C \)
\( \mathrm{P} \)
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(C) \( 2(\sin x+2 x \cos \theta)+C \)
(D) \( 2(\sin x-2 x \cos \theta)+C \)
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