The motion of an oscillating flywheel is defined by the relation = 0e??7t/6 sin4t, where is expressed in radians and t in seconds.

The motion of an oscillating flywheel is defined by the relation θ = θ0e??7πt/6 sin4πt, where θ is expressed in radians and t in seconds. Knowing that θ0 = 0.4 rad, determine the angular coordinate, the angular velocity, and the angular acceleration of the flywheel when

(a) t = 0.125 s,

(b) t = ??.