catanh

   Returns the complex arc hyperbolic tangent of its argument.
   
   This function is supported on OpenVMS Integrity servers and
   Alpha only.

   Format

     #include  <complex.h>

     double complex catanh  (double complex z);

     float complex catanhf  (float complex z);

     long double complex catanhl  (long double complex z);
 

Additional information available:

Argument        Description     Return_Values