# Angular Frequency **A measure of rotation rate or the rate of change of [[phase]].** > [!Example] Angular Frequency > $\omega=\frac{d\theta}{dt}=\frac{2\pi}{T}=2\pi f$ > - $d\theta$ - change in angle, $\text{rad}$ > - $dt$ - change in time, $\text{s}$ > - $T$ - [[Periodic Function#Period|period]], $\text{s}$ > - $f$ - *frequency*, $\text{Hz}$