Prove that cos. (pi)/(11). cos . (2 pi)/...

Prove that `cos. (pi)/(11). cos . (2 pi)/(11). cos . (3 pi)/(11) cos. (4 pi)/(11). cos . (5 pi)/(11)=(1)/(32)`

A

`1/4`

B

`1/8`

C

`1/16`

D

`1/32`

Verified by Experts

The correct Answer is:

D

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