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If tan θ = cosec 2θ - sin 2θ, then the value of tan^2θ is equal to

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If tan θ = cosec 2θ - sin 2θ, then the value of tan2θ is equal to

(1) 2 - √5

(2) -2 + √5

(3) (9 + 4√5)/(2 - √5)

(4) none of these

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Correct option (2) -2 + √5

Explanation :

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