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If f(x) = (1+tanx)/(1-tanx), then f^(')(...

If `f(x) = (1+tanx)/(1-tanx)`, then `f^(')(x) =`

A

`sec^(2)(pi/4-x)`

B

`tan^(2)(pi/4-x)`

C

`sec^(2)x`

D

`sec^(2)(pi/4+x)`

Text Solution

Verified by Experts

The correct Answer is:
D
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