CFLib.org – Common Function Library Project

Description:
Returns the inverse hyperbolic cosecant of an angle. If angle is 0, returns "undefined". All angles are expressed in radians.

Return Values:
Returns a numeric value or string.

Example:

<CFSET x=(Pi()/2)>
<CFOUTPUT>
Given x=#x#<BR>
The Acsch of #x# radians is: #Acsch(x)#
</CFOUTPUT>

Parameters:

Full UDF Source:

/**
 * Returns the inverse hyperbolic cosecant of an angle.
 * 
 * @param x      Any angle expressed in radians. 
 * @return Returns a numeric value or string. 
 * @author Rob Brooks-Bilson (rbils@amkor.com) 
 * @version 1.0, October 9, 2001 
 */
function Acsch(x){
  if (x EQ 0)
    return "undefined";
  else 
    return Log((Sgn(x)*Sqr(x*x+1)+1)/x);
}