# Sinusoid **A simple smooth [[Periodic Function|periodic]] oscillation defined in terms of the sine or cosine [[function]].** > [!Sinusoid] > $y(t)=A\sin(2\pi ft+\phi)=A\sin(\omega t+\phi)$ > - $A$ - *amplitude* or *peak value* > - $f$ - *frequency*, $\text{Hz}$ > - $\omega$ - [[angular frequency]], radians per second > - $\phi$ - [[phase]], radians or degrees. ![[Sinusoid.svg]]