The 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.
One has:
cacosh(z) = (0.5) * clog((1 + z) / (1 − z))
VERSIONS
These functions first appeared in glibc in version
2.1.
CONFORMING TO
C99.
SEE ALSO
acosh(3), cabs(3), cimag(3), complex(7)
COLOPHON
This page is part of release 3.22 of the Linux man-pages project. A
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http://www.kernel.org/doc/man-pages/.
Copyright 2002 Walter Harms(walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL