Simplify cos2(θ)−sin2(θ)\cos^2(\theta) - \sin^2(\theta)cos2(θ)−sin2(θ) using the double angle formula.
sin(2θ)\sin(2\theta)sin(2θ)
2cos(θ)2\cos(\theta)2cos(θ)
111
cos(2θ)\cos(2\theta)cos(2θ)