यदि cot theta = sqrt(7) है ,तो (cosec^(2...

यदि `cot theta = sqrt(7)` है ,तो `(cosec^(2)theta - sec^(2)theta)/(cosec^(2)theta + sec^(2)theta)` का मान है :

A

`(3)/(4)`

B

`(2)/(3)`

C

`(8)/(9)`

D

`(7)/(9)`

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The correct Answer is:

A

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