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(cos^4(pi/8))+(cos^4((3pi)/8))+(cos^4((5...

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

A

44/198

B

44200

C

442/57

D

3/2

Text Solution

Verified by Experts

The correct Answer is:
C
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