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If tanA - cotA = x, then value of x is?

(1 + 2cos2A)/(sinA cosA)
(sinA cosA)/(1 - 2cos2A)
(sinA cosA)/(1 + 2cos2A)
(1 - 2cos2A)/(sinA cosA)

Correct Answer: (1 - 2cos2A)/(sinA cosA)

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