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catanh, catanhf, catanhl - complex arc tangents hyperbolic

#include<complex.h>doublecomplexcatanh(doublecomplexz);floatcomplexcatanhf(floatcomplexz);longdoublecomplexcatanhl(longdoublecomplexz);Link with-lm.

Thecatanh() function calculates the complex arc hyperbolic tangent ofz. Ify=catanh(z), thenz=ctanh(y). The imaginary part ofyis chosen in the interval [-pi/2,pi/2]. One has: catanh(z) = 0.5 * clog((1 + z) / (1 - z))

These functions first appeared in glibc in version 2.1.

C99.

atanh(3),cabs(3),cimag(3),complex(7)

This page is part of release 3.24 of the Linuxman-pagesproject. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2008-08-11