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cos^2(pi/12)+cos^2(pi/4)+cos^2((5pi)/12)...

`cos^2(pi/12)+cos^2(pi/4)+cos^2((5pi)/12)=`

A

`2/(3+sqrt3)`

B

`2/3`

C

`(3+sqrt3)/2`

D

`3/2`

Text Solution

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