7.6 Exercise 51

Find the amplitude, period, and frequency of the given function.

The displacement $h \left(t\right)$ in centimeters of a mass suspended by a spring is modeled by the function $h \left(t\right) = 4 \cos \left(\frac{\pi}{2} t\right) ,$ where $t$ is measured in seconds. Find the amplitude, period, and frequency of this displacement.