EFUN: cos

SYNTAX:
float cos( x );
  float x;

DESCRIPTION:
Calculates the cosine of x. X must be given in radials
(360 degrees = 2 * pi radials, approximately 6.283).

RETURN VALUE:
The value of cos( x ) is returned (varies between -1 and 1).

SEE ALSO:
sin
tan

EXAMPLE:
float x;

x = cos( 3.14159 );
// x has now a value of (nearly) -1.
