The time period for the rotation of the conical pendulum moving in a horizontal circle (bob mass = M, string length L, and vertical half angle ; see figure) is given by the expression:
A) 2 {Lcos /g}1/2
B) 2 {Lsin /g}1/2
C) 2 Lcos /g
D) 2 Lsin /g
E) {2 Lcos /g}1/2
