The value of cos^(2)48^(@)-sin^(2)12^(@)...

The value of `cos^(2)48^(@)-sin^(2)12^(@)` is ........... A) `(sqrt5-1)/( 4)`
B) `(sqrt5+1)/(8)` C) `(sqrt3-1)/(4)` D) `(sqrt3+1)/(2sqrt2)`

A

`(sqrt5-1)/( 4)`

B

`(sqrt5+1)/(8)`

C

`(sqrt3-1)/(4)`

D

`(sqrt3+1)/(2sqrt2)`

Verified by Experts

The correct Answer is:

B

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