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$\int \frac{\cos x - c o x 2 x}{1 - \cos x} d x =$

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Correct option is A

cos⁡x−cos⁡2x=cos⁡x−2cos2⁡x+1=(1−cos⁡x)(1+2cos⁡x)

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∫cosx−cox2x1−cosxdx=

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$\int \frac{\cos x - c o x 2 x}{1 - \cos x} d x =$