The value of cos frac{pi} {5} cos frac{2...

The value of `cos frac{pi} {5} cos frac{2pi} {5} cos frac{4pi} {5} cos frac{8pi} {5} = `............... A) `(1)/(16)` B) 0 C) `(-1)/(8)` D) `(1)/(8)`

A

`(1)/(16)`

B

0

C

`(-1)/(8)`

D

`(-1)/(16)`

Verified by Experts

The correct Answer is:

D

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