If phi(x)=intcot^(4)x dx+(1)/(3)cot^(3)x...

If `phi(x)=intcot^(4)x dx+(1)/(3)cot^(3)x-cotx` and `phi((pi)/(2))=(pi)/(2)` then `phi(x)=`

A

`pi-x`

B

`x-pi`

C

`(pi)/(2)-x`

D

`x`

Verified by Experts

The correct Answer is:

4

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