The function x = (3.0 m) cos[(5ï€ rad/s)t + ï€/2 rad] gives the simple harmonic motion of a body. find the following values at t = 3.0 s.
(a) the displacement m
(b) the velocity (include the sign of the value in your answer.) m/s
(c) the acceleration (include the sign of the value in your answer.) /s^2
(d) the phase of the motion
(e) the frequency of the motion
(f) the period of the motion