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

`(1+cos.(pi)/(8))(1+cos.(3pi)/(8))(1+cos.(5pi)/(8))(1+cos.(7pi)/(8))` is equal to

A

`(1)/(2)`

B

`(1)/(8)`

C

`cos""(pi)/(8)`

D

`(1+sqrt(2))/(2 sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
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