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The value of tan^2 psi+cot^2 psi-sec^2 p...

The value of `tan^2 psi+cot^2 psi-sec^2 psi.cosec^2 psi` is equal to:
`tan^2 psi+cot^2 psi-sec^2 psi.cosec^2 psi` का मान किसके बराबर है?

A

a)`-2`

B

b)1

C

c)0

D

d)`-1`

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PINNACLE-TRIGONOMETRY-EXERCISE
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