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The value of (1+cospi//6)(1+cospi//3)(1+...

The value of `(1+cospi//6)(1+cospi//3)(1+cos2pi//3)(1+cos7pi//6)` is

A

`(3)/(16)`

B

`(3)/(8)`

C

`(3)/(4)`

D

`(1)/(2)`

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