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

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

A

`(1)/(2)`

B

1

C

`(3)/(2)`

D

2

Text Solution

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