# Cosine Plot (Degrees)

This figure illustrates the graph of cosine function from to . Geometrically, the cosine of an angle is equal to the component of the point formed by the angle on the unit circle. This figure also shows the numeric values of radian angles on the top edge of the plot grid. See also the related figures:

Figure |
---|

The cosine function returns the cosine of an angle provided in radians. In geometric terms, the function returns the ratio of the right-triangle's adjacent side over its hypotenuse.

The unit circle is a circle of radius one placed at the origin of the coordinate system. This article discusses how the unit circle represents the output of the trigonometric functions for all real numbers.

Plot of Cosine from 0 to τ (tau) radians.