- The definition of a sine curve is a graphic representation of the sine function.
An example of a sine curve is a drawing on a piece of graph paper that shows the equation y=sin x.

## sine curve

a graphic representation of the sine function; specif., the graph of

*y*= sin*x*, with*x*denoting radian measure of an angle periodically changing from 0° to 360°## sine curve

noun

The graph of the equation

*y*=*a*sin*bx,*where*a*and*b*are constants. Also called*sinusoid*.**sine curve**

The equation for this sine curve is

y = sin x.