indefinite-integration

Question: $\int_{{}}^{{}}{\frac{x-\sin x}{1-\cos x}dx=}$



1) $x\cot \frac{x}{2}+c$
2) $-x\cot \frac{x}{2}+c$
3) $\cot \frac{x}{2}+c$
4) None of these
Solution: Explanation: No Explanation
Integration by parts

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