casinh(3)

NAME

casinh, casinhf, casinhl — complex inverse hyperbolic sine

SYNOPSIS

/* -lm */
#include <complex.h>

double complex
casinh(double complex z);

float complex
casinhf(float complex z);

long double complex
casinhl(long double complex z);

DESCRIPTION

The casinh(), casinhf() and casinhl() functions compute the complex inverse hyperbolic sine of z.

For all complex floating-point numbers z,

casinh(z) = -i casin(iz).

RETURN VALUES

The casinh(), casinhf() and casinhl() functions return the complex inverse hyperbolic sine of z with imaginary part in the interval [-Pi/2, Pi/2], and unbounded real part.

SEE ALSO

cacosh(3), catanh(3)

STANDARDS

The casinh(), casinhf() and casinhl() functions conform to ISO/IEC 9899:1999 (“ISO C99”).