The particle travels clockwise. And if the particle travels in the opposite direction around the circle, the parametric equations are . Calculation: The particle travels clockwise. For example at the particle is at the point (0, 1), but at the time the particle has move to the point (1, 0) in a clockwise direction. The parametric equations when the particle travels in the opposite direction. The parametric equations will be exchanged that are, . Conclusion: Hence, the particle travels clockwise. And if the particle travels in the opposite direction around the circle, the parametric equations are .