indefinite-integration

Question: $\int_{{}}^{{}}{\frac{\cot x\tan x}{{{\sec }^{2}}x-1}}\ dx=$



1) $\cot x-x+c$
2) $-\cot x+x+c$
3) $\cot x+x+c$
4) $-\cot x-x+c$
Solution: Explanation: No Explanation
Fundamental integration

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