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`cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)cos((5pi)/15)cos((6pi)/15)cos((7pi)/15)` = `1/2^7`

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`cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)cos((5pi)/15)cos((6pi)/15)cos((7pi)/15)` = `1/2^7`
A. `(1)/(2^(6))`
B. `(1)/(2^(7))`
C. `(1)/(2^(8))`
D. none of these
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Correct Answer - B
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