228. assignment (particle oscillation)

The position of a particle in cm is given by x = (8) cos2 t, where t is in seconds.

1)

(a) What is the frequency?

 

2)

(b) What is the period?

 

4)

(d) What is the first time after t = 0 that the particle is at its equilibrium position?

Video description:
https://youtu.be/9Mkq6tBJsr8