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(1+cos""(pi)/(8))(1+cos""(2pi)/(8))(1+co...

`(1+cos""(pi)/(8))(1+cos""(2pi)/(8))(1+cos""(3pi)/(8))(1+cos""(4pi)/(8))(1+cos""(5pi)/(8))(1+cos""(6pi)/(8))(1+cos""(7pi)/(8))=`

A

`(1)/(8)`

B

`(1)/(16)`

C

`(1)/(32)`

D

`(1)/(64)`

Text Solution

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The correct Answer is:
B
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