Which expression is equivalent to sin2(θ)\sin^2(\theta)sin2(θ)?
1−cos2(θ)1 - \cos^2(\theta)1−cos2(θ)
1+cos2(θ)1 + \cos^2(\theta)1+cos2(θ)
cos2(θ)−1\cos^2(\theta) - 1cos2(θ)−1
1csc2(θ)\frac{1}{\csc^2(\theta)}csc2(θ)1