If (cos2θ)/(cot2θ-cos2θ) =3, where 0º < θ < 90º then the value of θ is:
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Correct answer: C
Explanation
The correct answer is option 3 i.e. 60º
cos2θ/(cot2θ - cos2θ) = 3
cos2θ = 3cot2θ - 3cos2θ
4 cos2θ = 3 cos2θ/sin2θ
sin2θ = 3/4
sinθ = /2
sinθ = sin60
θ = 60°