(1 + cos"" (pi)/(8))(1 + cos"" (3pi)/(8)...

`(1 + cos"" (pi)/(8))(1 + cos"" (3pi)/(8)) (1 + cos"" (5pi)/(8))(1 + cos"" (7pi)/(8))` =

A

`1/8`

B

`1/2`

C

`1/sqrt3`

D

`1/sqrt2`

Verified by Experts

The correct Answer is:

A

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