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The value of cos(pi/10)cos((2pi)/10)cos...

The value of `cos(pi/10)cos((2pi)/10)cos((4pi)/10)cos((8pi)/10)cos((16pi)/10)` is

A

`sqrt(10+2sqrt(5))/(64)`

B

`-(cos (pi//10))/(16)`

C

`(cos (pi//10))/(16)`

D

`-sqrt(10+2sqrt(5))/(64)`

Text Solution

Verified by Experts

The correct Answer is:
B, D
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