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If tan theta=1/sqrt7,then (c o s e c^2th...

If `tan theta=1/sqrt7`,then `(c o s e c^2theta-sec^2theta)/(c o s e c^2theta+sec^2theta)=?`

A

`3//4`

B

`2//3`

C

`1//2`

D

1

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The correct Answer is:
A
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