Answer it correctly please. Explain your answer. I will rate accordingly with multiple votes.

Q4: Consider the motion of the particle with r = 1, d = wt, 0 = + cos 4wt where I is constant. By using the spherical coordinates, the speed as a function of time is A. 12w cos2( cos2w) + 12(2 sin2 2wt 4 B. 12w2 cos2("cosw) -12w2--sin2 4wt C. 12w cos (" cos4w) + 12(12 sin2 4wt D. 12w2cos2(-cos4w) + 12w2-- sin2 4wt