casinhl(3) - Linux man page
Name
casinh, casinhf, casinhl - complex arc sine hyperbolicSynopsis
#include <complex.h>double complex casinh(double complex z);
float complex casinhf(float complex z);
long double complex casinhl(long double complex z);
Link with -lm.
Description
The casinh() function calculates the complex arc hyperbolic sine of z. If y = casinh(z), then z = csinh(y). The imaginary part of y is chosen in the interval [-pi/2,pi/2].One has:
casinh(z) = clog(z + csqrt(z * z + 1))