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# SINH

Section: Linux Programmer's Manual (3)
Updated: 2015-03-02

## NAME

sinh, sinhf, sinhl - hyperbolic sine function

## SYNOPSIS

```#include <math.h>

double sinh(double x);

float sinhf(float x);

long double sinhl(long double x);
```

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

sinhf(), sinhl():

_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99

## DESCRIPTION

The sinh() function returns the hyperbolic sine of x, which is defined mathematically as:
```
sinh(x) = (exp(x) - exp(-x)) / 2
```

## RETURN VALUE

On success, these functions return the hyperbolic sine of x.

If x is a NaN, a NaN is returned.

If x is +0 (-0), +0 (-0) is returned.

If x is positive infinity (negative infinity), positive infinity (negative infinity) is returned.

If the result overflows, a range error occurs, and the functions return HUGE_VAL, HUGE_VALF, or HUGE_VALL, respectively, with the same sign as x.

## ERRORS

See math_error(7) for information on how to determine whether an error has occurred when calling these functions.

The following errors can occur:

Range error: result overflow
errno is set to ERANGE. An overflow floating-point exception (FE_OVERFLOW) is raised.

## ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
 Interface Attribute Value sinh(), sinhf(), sinhl() Thread safety MT-Safe

## CONFORMING TO

C99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.

acosh(3), asinh(3), atanh(3), cosh(3), csinh(3), tanh(3)

## Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
CONFORMING TO
COLOPHON

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