The cacos() function
calculates the complex arc cosine of z. If y = cacos(z), then z = ccos(y). The real part of
y is chosen in the interval
[0,pi].
One has:
cacos(z) = −i clog(z + csqrt(z * z − 1))
VERSIONS
These functions first appeared in glibc in version
2.1.
CONFORMING TO
C99.
SEE ALSO
ccos(3), clog(3), complex(7)
COLOPHON
This page is part of release 3.22 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/.
Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL