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If tan^(-1)(sin^2theta-2sintheta+3)+cot^...

If `tan^(-1)(sin^2theta-2sintheta+3)+cot^(-1)(5^(sec^(2)y)+1)=pi/2,` then value of `cos^2theta-sintheta` is equal to

A

0

B

`-1`

C

1

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
C
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