If 2x = Sinθ and 2/x = cosθ, then the value of 4 (x2 + 1/x2) is:
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Correct answer: A
Explanation
The correct answer is option 1 i.e 1
We have given that
⇒ 2x = sinθ & 2 / x = cosθ
By squaring both equations we would get
⇒ 4x2 = sin2θ & 4 / x2 = cos2θ
By adding both the equations
⇒ 4x2 + 1 / 4x2 = sin2θ + cos2θ
⇒ 4(x2 + 1 / x2) = 1