Prove:cos(pi/15)cos((2pi)/15)cos((3pi)/1...

Prove:`cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)cos((5pi)/15)cos((6pi)/15)cos((7pi)/15)` = `1/2^7`

A

`1//128`

B

`1//64`

C

`1//16`

D

none of these

Verified by Experts

The correct Answer is:

A

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