Express cos(θ)−sin(θ)\cos(\theta) - \sin(\theta)cos(θ)−sin(θ) in the form Rsin(θ+α)R\sin(\theta + \alpha)Rsin(θ+α) or Rcos(θ+α)R\cos(\theta + \alpha)Rcos(θ+α).
2cos(θ+π4)\sqrt{2}\cos(\theta + \frac{\pi}{4})2cos(θ+4π)
2sin(θ+π4)\sqrt{2}\sin(\theta + \frac{\pi}{4})2sin(θ+4π)
2cos(θ−π4)\sqrt{2}\cos(\theta - \frac{\pi}{4})2cos(θ−4π)
2sin(θ+π4)2\sin(\theta + \frac{\pi}{4})2sin(θ+4π)