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What is the value of (32 cos6x – 48 cos4x + 18 cos2x – 1)/[4 sin x cos x sin (60 – x) cos (60 – x) sin (60 + x) cos (60 + x)] ?

4 tan 6x
4 cot 6x
8 cot 6x
8 tan 6x

Correct Answer: 8 cot 6x

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