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The value of int(1/e)^tanx(tdt)/(1+t^2)+...

The value of `int_(1/e)^tanx(tdt)/(1+t^2)+int_(1/e)^cotxdt/(t(1+t^2)` is

A

`1/(2+tan^2x)`

B

1

C

`pi/4`

D

`2/piint(-1)^1dt/(1+t^2)`

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The correct Answer is:
B, D
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PATHFINDER-DEFINITE INTEGRATION-QUESTION BANK
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