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

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

A

`log |cosx-sin x|+c`

B

`log |cosx+sin x|+c`

C

`-log |(cosx)|+c`

D

none

Text Solution

Verified by Experts

The correct Answer is:
B
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