CACOSHSection: Linux Programmer's Manual (3)
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NAMEcacosh, cacoshf, cacoshl - complex arc hyperbolic cosine
double complex cacosh(double complex z);
float complex cacoshf(float complex z);
long double complex cacoshl(long double complex z);
DESCRIPTIONThe cacosh() function calculates the complex arc hyperpolic cosine of z. If y = cacosh(z), then z = ccosh(y). The imaginary part of y is chosen in the interval [-pi,pi]. The real part of y is chosen non-negative.
cacosh(z) = (0.5) * clog((1 + z) / (1 - z))
VERSIONSThese functions first appeared in glibc in version 2.1.
SEE ALSOacosh(3), cabs(3), cimag(3), complex(7)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.