(cot^2 15^@-1)/(cot^2 15^@+1)=.............

`(cot^2 15^@-1)/(cot^2 15^@+1)=`........... A) `1/2` B) `(sqrt3)/(2)` C) `(3 sqrt3)/(4)` D) `sqrt3`

A

`1/2`

B

`(sqrt3)/(2)`

C

`(3 sqrt3)/(4)`

D

`sqrt3`

Verified by Experts

The correct Answer is:

B

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