# $EPIC: cos.txt,v 1.4 2006/07/24 19:50:14 sthalik Exp $
======Synopsis:======
$[[cos]](//<number>//)

======Technical:======
  * Returns the cosine of the angle of //<number>// radians.
  * If the <number> argument is omitted the empty string is returned.
  * As always, the return value is limited to 6 decimal places.
  * As always, DOM or RANGE means there was an error.

======Returns:======
The cosine of an angle

======History:======