CSINH(3) | Library Functions Manual | CSINH(3)

# NAME

`csinh`, `csinhf`, `csinhl` — complex hyperbolic sine

# SYNOPSIS

Math Library (libm, -lm)
`#include <complex.h>`

double complex
`csinh`(double complex z);

float complex
`csinhf`(float complex z);

long double complex
`csinhl`(long double complex z);

# DESCRIPTION

The `csinh`(), `csinhf`() and `csinhl`() functions compute the complex hyperbolic sine of z.

For all complex floating-point numbers z,

    csinh(z) = (cexp(z) - cexp(-z)) / 2.

# RETURN VALUES

The `csinh`(), `csinhf`() and `csinhl`() functions return the complex hyperbolic sine of z.

# SEE ALSO

ccosh(3), ctanh(3)

# STANDARDS

The `csinh`(), `csinhf`() and `csinhl`() functions conform to ISO/IEC 9899:1999 (“ISO C99”).

June 7, 2025 | Debian