∫ 1 + tan 2 x 1 - tan 2 x d x =

1. $\log \left(\frac{1-\tan x}{1+\tan x}\right)+c$
2. $\log \left(\frac{1+\tan x}{1-\tan x}\right)+c$
3. $\frac{1}{2}\log \left(\frac{1-\tan x}{1+\tan x}\right)+c$
4. $\frac{1}{2}\log \left(\frac{1+\tan x}{1-\tan x}\right)+c$

Solution

Asked in: AP EAMCET 2020 (23 Sep Shift 1)

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