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If tan theta=1/ sqrt7, then ((cosec^2 th...

If `tan theta=1/ sqrt7`, then `((cosec^2 theta-sec^2 theta)/(cosec^2 theta+sec^2 theta))`=

A

`1/2`

B

`3/4`

C

`5/4`

D

2

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MODERN PUBLICATION-TRIGNOMETRY-EXERCISE
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