indefinite-integration

Question: $\int_{{}}^{{}}{\frac{d\theta }{\sin \theta {{\cos }^{3}}\theta }=}$

1) $\log \tan \theta +{{\tan }^{2}}\theta +c$

2) $\log \tan \theta -\frac{1}{2}{{\tan }^{2}}\theta +c$

3) $\log \tan \theta +\frac{1}{2}{{\tan }^{2}}\theta +c$

4) None of these

Solution:

Explanation: No Explanation

Integration by substitution

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