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The value of cos^4(pi/8)+ cos^4((3pi)/8)...

The value of `cos^4(pi/8)+ cos^4((3pi)/8)`+ cos^4(5 pi)/8)+ cos^4((7pi)/8)` is

A

0

B

`1/2`

C

`3/2`

D

1

Text Solution

Verified by Experts

The correct Answer is:
C
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