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the value of cos(pi)/(2^2)cos(pi)/(2^3)c...

the value of `cos(pi)/(2^2)``cos(pi)/(2^3)``cos(pi)/(2^4)` .....`cos(pi)/(2^(10))``sin(pi)/(2^(10))` is (a) `(1)/(1024)` (b) `(1)/(512)` (c) `(1)/(256)` (d) `(1)/(128)`

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