The value of cos^2(pi/12)+cos^2(pi/4)+c...

The value of `cos^2(pi/12)+cos^2(pi/4)+cos^2((5pi)/12)` is ............ A) `(2)/(3+sqrt3)` B) `2/3` C) `(3+ sqrt3)/(2)` D) `3/2`

A

`(2)/(3+sqrt3)`

B

`2/3`

C

`(3+ sqrt3)/(2)`

D

`3/2`

Verified by Experts

The correct Answer is:

D

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