# Translations:Sinusoidal motion/10/en

Jump to navigation
Jump to search

As the vector rotates, its projection on the *x*-axis traces out a cosine curve, and its projection on the *y*-axis traces out a sine curve. Both and represent sinusoidal motion at a fixed frequency . Such motion is called either sinusoidal motion or *simple harmonic motion*. Instead of using a continuous time scale *t* for the signal, digital processing requires first choosing a time increment and then defining the time index *n* so that time is given by . A typical time increment is 0.004 s.