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(1+"cos"(pi)/8)(1+"cos"(3pi)/8)(1+"cos"(...

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

A

`1/8`

B

`1/2`

C

`1/(sqrt(3))`

D

`1/(sqrt(2))`

Text Solution

Verified by Experts

The correct Answer is:
A
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