---
name: "sinhl"
section: "3"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/sinh"
---

# sinhl(3)

hyperbolic sine function

Part of [sinh(3)](/sinh/3.md).

## NAME

**sinh**, **sinhf**, **sinhl** – hyperbolic sine function

## LIBRARY

Math Library (libm, -lm)

## SYNOPSIS

**#include \<math.h\>**

*double*\

**sinh**(*double x*);

*float*\

**sinhf**(*float x*);

*long* *double*\

**sinhl**(*long double x*);

## DESCRIPTION

The **sinh**(), **sinhf**(), and **sinhl**() functions compute the hyperbolic sine of *x*.

## SEE ALSO

[acos(3)](/acos/3.md), [asin(3)](/asin/3.md), [atan(3)](/atan/3.md), [atan2(3)](/atan2/3.md), [cos(3)](/cos/3.md), [cosh(3)](/cosh/3.md), [csinh(3)](/csinh/3.md), [math(3)](/math/3.md), [sin(3)](/sin/3.md), [tan(3)](/tan/3.md), [tanh(3)](/tanh/3.md)

## STANDARDS

The **sinh**() function conforms to ISO/IEC 9899:1990 (“ISO C90”).

## HISTORY

The **sinh**() function first appeared in Version 7 AT&T UNIX.