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if int0^(pi)(x/(1+sinx))^2dx=A, then int...

if `int_0^(pi)(x/(1+sinx))^2dx=A`, then `int_0^(pi)((2x^2).(cos^2(x/2)))/(1+sinx)^2` is equal to

A

`A+2pi-pi^2`

B

`A-2pi+pi^2`

C

`2pi-A-pi^2`

D

none of these

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The correct Answer is:
A
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PATHFINDER-DEFINITE INTEGRATION-QUESTION BANK
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  17. If int0^1 ((1-x^2)dx)/(1+x^2+x^4) =aInb then,

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  18. If f(x)=int(-2)^xabs(t+1)dt then,

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