Let P(k) = (1+"cos"(pi)/(4k))(1+"cos"((2...

Let `P(k) = (1+"cos"(pi)/(4k))(1+"cos"((2k-1)pi)/(4k))(1 + "cos" ((2k+1)pi)/(4k))(1+"cos"((4k-1)pi)/(4k))`. Then

A

`P(3) = (1)/(16)`

B

`P(4) = (2- sqrt(2))/(16)`

C

`P(5) = (3 - sqrt(5))/(32)`

D

`P(6) = (2 - sqrt(3))/(16)`

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The correct Answer is:

A, B, C, D

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