cacos
Prev  Section 3  Next

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);
[Note] Note

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))

CONFORMING TO

C99

SEE ALSO

ccos(3), clog(3), complex(7)

COLOPHON

This page is part of release 2.79 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
Prev  Up  Next
cabs  Home  cacosh