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

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

A

(a) `1/3log[(cosx-sinx)]^(3)+c`

B

(b) `tan(x-pi/4)+c`

C

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

D

(d) `2((1+sec^(2)x)/(1-sec^(2)x))+c`

Verified by Experts

The correct Answer is:

C

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