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Section: Mathematical Functions
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. 
The acoth function is computed from the formula 
![\[ \coth^{-1}(x) = \tanh^{-1}\left(\frac{1}{x}\right) \]](form_43.png) 
Here is a simple plot of the inverse hyperbolic cotangent function
--> x = linspace(1,pi);
--> plot(x,acoth(x)); grid('on');
