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int (1- tan x//2)/(1+ tan x//2)dx=...

`int (1- tan x//2)/(1+ tan x//2)dx=`

A

`2 log|sec x//2|+c`

B

`2 log|cosx//2|+c`

C

`2 log|sec(pi//4- x//2)|+c`

D

`2log |cos (pi//4-x//2)|+c`

Text Solution

Verified by Experts

The correct Answer is:
D
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