Computes the complex arc hyperbolic cosine.
#include <complex.h> double complex cacosh (z) double complex z; float complex cacoshf (z) float complex z; long double complex cacoshl (z) long double complex z;
The cacosh, cacoshf, or cacoshl subroutine computes the complex arc hyperbolic cosine of the z parameter, with a branch cut at values less than 1 along the real axis.
| z | Specifies the value to be computed. |
The cacosh, cacoshf, or cacoshl subroutine returns the complex arc hyperbolic cosine value, in the range of a half-strip of non-negative values along the real axis and in the interval [-i pi , +i pi ] along the imaginary axis.
The ccosh, ccoshf, or ccoshl Subroutine.