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cacosl (3)
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 acos(). 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)
2002-07-28 CACOS(3)
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