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cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine

#include<complex.h>doublecomplexcacosh(doublecomplexz);floatcomplexcacoshf(floatcomplexz);longdoublecomplexcacoshl(longdoublecomplexz);Link with-lm.

Thecacosh() function calculates the complex arc hyperpolic cosine ofz. Ify=cacosh(z), thenz=ccosh(y). The imaginary part ofyis chosen in the interval [-pi,pi]. The real part ofyis chosen nonnegative. One has: cacosh(z) = (0.5) * clog((1 + z) / (1 - z))

These functions first appeared in glibc in version 2.1.

C99.

acosh(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