ACOTH Inverse Hyperbolic Cotangent Function
Section:  Mathematical Functions 
Usage
Computes the inverse hyperbolic cotangent of its argument.  The general
syntax for its use is
  y = acoth(x)
where x is an n-dimensional array of numerical type.
Function Internals
The acoth function is computed from the formula
Examples
Here is a simple plot of the inverse hyperbolic cotangent function
--> x = linspace(1,pi);
--> plot(x,acoth(x)); grid('on');