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int((1+tanx)/(1-tanx))dx...

`int((1+tanx)/(1-tanx))dx`

A

`logsec(pi/4-x)+c`

B

`logcos(pi/4+x)+c`

C

`logsin(pi/4+x)+c`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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