SINH(3M) Mathematical Library Functions SINH(3M)

sinh, sinhf, sinhl - hyperbolic sine function

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
double sinh(double x);

float sinhf(float x);

long double sinhl(long double x);

These functions compute the hyperbolic sine of x.

Upon successful completion, these functions return the hyperbolic sine of x.

If the result would cause an overflow, a range error occurs and ±HUGE_VAL, ±HUGE_VALF, and ±HUGE_VALL (with the same sign as x) is returned as appropriate for the type of the function.

If x is NaN, a NaN is returned.

If x is ±0 or ±Inf, x is returned.

For exceptional cases, matherr(3M) tabulates the values to be returned by acos() as specified by SVID3 and XPG3.

These functions will fail if:

Range Error

The result would cause an overflow.

If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the overflow floating-point exception is raised.

The asinh() function sets errno to ERANGE if the result would cause an overflow.

An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception has been raised. An application should either examine the return value or check the floating point exception flags to detect exceptions.

An application can also set errno to 0 before calling asinh(). On return, if errno is non-zero, an error has occurred. The asinhf() and asinhl() functions do not set errno.

See attributes(7) for descriptions of the following attributes:

Interface Stability Standard
MT-Level MT-Safe

math.h(3HEAD), asinh(3M), cosh(3M), feclearexcept(3M), fetestexcept(3M), isnan(3M), matherr(3M), tanh(3M), attributes(7), standards(7)

July 12, 2006 SunOS 5.11