# Cos Procedure

Returns the cosine of the given angle

*x*, which is specified in radians.
To specify an angle in degrees, multiply the angle by

PI/180 to get the equivalent in radians.

Warning: The input number is internally converted to a less precise

64-bit binary floating-point format.
The result is computed in this format and then converted back to TMBASIC's

128-bit decimal floating-point format.
These conversions may cause a loss of precision.

Declaration

function Cos(x as Number) as Number

### Parameters

*x* as Number — Input angle, in radians.

### Return value

Number — Cosine of

*x*.

### Example

Code

print Cos(0)

print Cos(PI)

Output