indefinite-integration

Question: $\int_{{}}^{{}}{\frac{\text{cose}{{\text{c}}^{2}}x}{1+\cot x}dx=}$



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

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