indefinite-integration

Question: $\int_{{}}^{{}}{(3\,\text{cose}{{\text{c}}^{2}}x+2\sin 3x)\ dx=}$



1) $3\cot x+\frac{2}{3}\cos 3x+c$
2) $-\left( 3\cot x+\frac{2}{3}\cos 3x \right)+c$
3) $3\cot x-\frac{2}{3}\cos 3x+c$
4) None of these
Solution: Explanation: No Explanation
Fundamental integration

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