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If f(x)int(0)^(k) (Cos x)/(1+Sin^(2)x)dx...

If f(x)`int_(0)^(k) (Cos x)/(1+Sin^(2)x)dx= pi/4` then `K=`

A

`pi/4`

B

`pi/2`

C

`pi`

D

`2pi`

Text Solution

Verified by Experts

The correct Answer is:
B
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