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); |
![[Note]](../stylesheet/note.png) |
Note |
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DESCRIPTION
The cacosh() function
calculates the complex arc hyperpolic cosinze of z. 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))