indefinite-integration

Question: $\int{\frac{\cos 2x-1\,\,}{\cos 2x+1}dx=}$

1) $\tan x-x+c$

2) $x+\tan x+c$

3) $x-\tan x+c$

4) $-x-\cot x+c$

Solution:

Explanation: No Explanation

Fundamental integration

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