sinh(3) Library Functions Manual sinh(3) 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 math- ematically 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 (nega- tive 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 at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │sinh(), sinhf(), sinhl() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS C99, POSIX.1-2001, POSIX.1-2008. The variant returning double also conforms to SVr4, 4.3BSD. SEE ALSO acosh(3), asinh(3), atanh(3), cosh(3), csinh(3), tanh(3) Linux man-pages 6.03 2023-02-05 sinh(3)
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