The Angular Displacement of a Simple Pendulum Is Given by θ(T)=

Multiple Choice

The angular displacement of a simple pendulum is given by θ(t) = θ_m cos (ωt + φ) .If the pendulum is 45 cm in length, and is given an angular speed dθ/dt = 3.4 rad/s at time t = 0, when it is hanging vertically, what is θ_m?

A) 4.6 rad
B) 3.4 rad
C) 1.4 rad
D) 0.73 rad
E) 0.45 rad