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cacoshl (3)
CACOSH(3) Linux Programmer's Manual CACOSH(3)
NAME
cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine
SYNOPSIS
#include <complex.h>
double complex cacosh(double complex z);
float complex cacoshf(float complex z);
long double complex cacoshl(long double complex z);
Link with -lm.
DESCRIPTION
The cacosh() function calculates the complex acosh(). 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)).
CONFORMING TO
C99
SEE ALSO
acosh(3), cabs(3), cimag(3), complex(7)
2002-07-28 CACOSH(3)
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