If √3 tanθ = 3 sinθ, θ≠0 and θ is an acute angle, then find the value of . . .

Question : If √3 tanθ = 3 sinθ, θ≠0 and θ is an acute angle, then find the value of sin2θ - cos2θ.

Doubt by Sanya

Solution : Detailed Solution Coming Soon.
Ans : 1/3