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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);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
sinhf(), sinhl():
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|| /* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
DESCRIPTION
These functions return 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 │
└─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
C11, POSIX.1-2008.
HISTORY
C99, POSIX.1-2001.
The variant returning double also conforms to SVr4, 4.3BSD, C89.
SEE ALSO
acosh(3), asinh(3), atanh(3), cosh(3), csinh(3), tanh(3)
Linux man-pages 6.7 2023-10-31 sinh(3)