casinhl (3)

#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.

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))

These functions first appeared in glibc in version 2.1.

C99.

asinh(3), cabs(3), cimag(3), csinh(3), complex(7)

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