catanh

catanhf, catanh, catanhl

Defined in header <complex.h>
float complex       catanhf( float complex z );
(1) (since C99)
double complex      catanh( double complex z );
(2) (since C99)
long double complex catanhl( long double complex z );
(3) (since C99)
Defined in header <tgmath.h>