catanh()

Computes the arc value of hyperbolic tangent.

 #include <math.h> 
   double complex catanh(double complex x); 
   float complex catanhf(float complex x); 
   long double complex catanhl(long double complex x);

Parameter

x

A complex value.

Remarks

These functions return the hyperbolic arctangent of the argument x, in radians. If x is out of range then these functions set errno to EDOM and

  fpclassify(catanh(x))

returns FP_NAN.

This facility may not be available on configurations of the EWL that run on platforms that do not have floating-point math capabilities.