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If (tan^-1x)^2 + (cot^-1x)^2 =(5 pi^2)/8...

If `(tan^-1x)^2 + (cot^-1x)^2 =(5 pi^2)/8` then `x` equals :

A

(a) `-1`

B

(b) `1`

C

(c) `0`

D

(d) `4`

Text Solution

Verified by Experts

The correct Answer is:
A
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