CACOS(3) Linux Programmer's Manual CACOS(3) NAME cacos, cacosf, cacosl - complex arc cosine SYNOPSIS #include <complex.h> double complex cacos(double complex z); float complex cacosf(float complex z); long double complex cacosl(long double complex z); Link with -lm. DESCRIPTION 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 3.27 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/. 2008-08-11 CACOS(3)
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