indefinite-integration

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



1) $\log (\cos x-x\sin x)+c$
2) $\log (x\sin x-\cos x)+c$
3) $\log (\sin x-x\cos x)+c$
4) None of these
Solution: Explanation: No Explanation
Integration by substitution

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