indefinite-integration

Question: $\int_{{}}^{{}}{\frac{1}{\cos x(1+\cos x)}}\ dx=$



1) $\log (\sec x+\tan x)+2\tan \frac{x}{2}+c$
2) $\log (\sec x+\tan x)-2\tan \frac{x}{2}+c$
3) $\log (\sec x+\tan x)+\tan \frac{x}{2}+c$
4) $\log (\sec x+\tan x)-\tan \frac{x}{2}+c$
Solution: Explanation: No Explanation
Integration of rational functions by using partial fractions Evaluation of various forms of integration

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