indefinite-integration

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

1) $2\tan \frac{x}{2}-x+c$

2) $\frac{1}{2}\tan \frac{x}{2}-x+c$

3) $x-\frac{1}{2}\tan \frac{x}{2}+c$

4) $x-2\tan \frac{x}{2}+c$

Solution:

Explanation: No Explanation

Fundamental integration

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