indefinite-integration

Question: $\int_{{}}^{{}}{\frac{\sin x\ dx}{{{a}^{2}}+{{b}^{2}}{{\cos }^{2}}x}}=$



1) $\log ({{a}^{2}}+{{b}^{2}}{{\cos }^{2}}x)+c$
2) $\frac{1}{ab}{{\tan }^{-1}}\left( \frac{a\cos x}{b} \right)+c$
3) $\frac{1}{ab}{{\cot }^{-1}}\left( \frac{b\cos x}{a} \right)+c$
4) $\frac{1}{ab}{{\cot }^{-1}}\left( \frac{a\cos x}{b} \right)+c$
Solution: Explanation: No Explanation
Integration by substitution

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