Chapter 4.2, Problem 67PS

Frequency With simple harmonic motion, the reciprocal of the period is called the frequency. The frequency, given by $f=1/\text{period}$ represents the number of cycles (or oscillations) that are completed per unit time. The units used to describe frequency are Hertz, where $\text{1 HZ}=1$ cycle per second.

Alternating Current In Europe, the voltage of the alternating current coming through an electrical outlet can be modeled by the function $V=230\sin (100\pi t)$, where $t$ is measured in seconds and $V$ in volts. What is the frequency of the voltage?