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If int (4 sec^(2)" x tan x")/(sec^(2) " ...

If `int (4 sec^(2)" x tan x")/(sec^(2) " x + tan"^(2) x)" dx = log " |1 + f(x) | + C ` then f(x) =

A

2 `sin^(2) ` x

B

`2 cos^(2) `x

C

`2 tan^(2) ` x

D

`2 cot^(2)` x

Text Solution

Verified by Experts

The correct Answer is:
C
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