A function giving the cosine of its radian argument.

X=COS(angle)

This function returns the cosine of an angle. The angle must be expressed in radians, not degrees.

Whilst the computer is quite happy dealing with angles expressed in radians, you may prefer to express angles in degrees. You can use the RAD function to convert an angle from degrees to radians.

The example below sets Y to the cosine of the angle 'degree_angle' expressed in degrees.

Y=COS(RAD(degree_angle))

## Syntax

`<n-var>=COS(<numeric>)`