cacosh(3) -- Linux man page
NAME
cacosh, cacoshf, cacoshl - complex arc hyperbolic cosine
SYNOPSIS
#include <complex.h>
double complex cacosh(double complex z);
float complex cacoshf(float complex double z);
long double complex cacoshl(long double complex z);
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*i,pi*i].
The real part of y is chosen nonnegative.
One has cacosh(z) = (0.5)*clog((1+z)/(1-z)).
CONFORMING TO
C99
SEE ALSO
cabs(3),
cimag(3),
acosh(3)
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