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`cos^6pi/9-33tan^4pi/9+27tan^2pi/9` is equal to 0 (b) `sqrt(3)` (c) 3 (d) 9

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`cos^6pi/9-33tan^4pi/9+27tan^2pi/9` is equal to 0 (b) `sqrt(3)` (c) 3 (d) 9
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Correct Answer - C
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