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The value of 36 (4 cos^2 9^@-1)(4 cos^2 ...

The value of `36 (4 cos^2 9^@-1)(4 cos^2 27^@-1)(4 cos^2 81^@-1)(4 cos^2 243^@-1)` is

A

54

B

18

C

27

D

36

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