EFUN: sin

SYNTAX:
float sin( x );
  float x;

DESCRIPTION:
Calculates the sine of x. X must be given in radials
(360 degrees = 2 * pi radials, approximately 6.2831853).

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

SEE ALSO:
cos
tan

EXAMPLE:
float x;

x = sin( 3.14159 );
// x has now a value of (nearly) 0.
