Answer-If tanθ = x then find the value of cos 2θ?

cos 2theta 1-tansup2theta1tansup2theta 1 - xsup21 xsup2

Question

If tanθ = x then find the value of cos

2θ?

A (1+ x²)/(1- x²)

B (1+ x²)/(1 + x²)

C (1 - x²)/(1- x²)

D (1 - x²)/(1 + x²)

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