# sinh, sinhf, sinhl

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< c‎ | numeric‎ | math

Defined in header `<math.h>` |  |
float sinhf( float arg ); | (1) | (since C99)
double sinh( double arg ); | (2) |
long double sinhl( long double arg ); | (3) | (since C99)
Defined in header `<tgmath.h>` |  |
#define sinh( arg ) | (4) | (since C99)

1-3) Computes hyperbolic sine of `arg`.
4) Type-generic macro: If the argument has type long double, `sinhl` is called. Otherwise, if the argument has integer type or the type double, `sinh` is called. Otherwise, `sinhf` is called. If the argument is complex, then the macro invokes the corresponding complex function (csinhf, csinh, csinhl).

### Parameters

arg | - | floating point value representing a hyperbolic angle

### Return value

If no errors occur, the hyperbolic sine of `arg` (sinh(arg), or

earg -e-arg
2

) is returned.

If a range error due to overflow occurs, `±HUGE_VAL`, `±HUGE_VALF`, or `±HUGE_VALL` is returned.

If a range error occurs due to underflow, the correct result (after rounding) is returned.

### Error handling

Errors are reported as specified in math_errhandling.

If the implementation supports IEEE floating-point arithmetic (IEC 60559),

- if the argument is ±0 or ±∞, it is returned unmodified
- if the argument is NaN, NaN is returned

### Notes

POSIX specifies that in case of underflow, `arg` is returned unmodified, and if that is not supported, an implementation-defined value no greater than DBL_MIN, FLT_MIN, and LDBL_MIN is returned.

### Example

Run this code

    #include <stdio.h>
    #include <math.h>
    #include <errno.h>
    #include <fenv.h>

    #pragma STDC FENV_ACCESS ON
    int main(void)
    {
        printf("sinh(1) = %f\nsinh(-1)=%f\n", sinh(1), sinh(-1));
        printf("log(sinh(1) + cosh(1))=%f\n", log(sinh(1)+cosh(1)));
        // special values
        printf("sinh(+0) = %f\nsinh(-0)=%f\n", sinh(0.0), sinh(-0.0));
        // error handling
        errno=0; feclearexcept(FE_ALL_EXCEPT);
        printf("sinh(710.5) = %f\n", sinh(710.5));
        if(errno == ERANGE) perror("    errno == ERANGE");
        if(fetestexcept(FE_OVERFLOW)) puts("    FE_OVERFLOW raised");
    }

Possible output:

    sinh(1) = 1.175201
    sinh(-1)=-1.175201
    log(sinh(1) + cosh(1))=1.000000
    sinh(+0) = 0.000000
    sinh(-0)=-0.000000
    sinh(710.5) = inf
        errno == ERANGE: Numerical result out of range
        FE_OVERFLOW raised

### References

- C11 standard (ISO/IEC 9899:2011):

  - 7.12.5.5 The sinh functions (p: 241-242)

  - 7.25 Type-generic math <tgmath.h> (p: 373-375)

  - F.10.2.5 The sinh functions (p: 520)

- C99 standard (ISO/IEC 9899:1999):

  - 7.12.5.5 The sinh functions (p: 222)

  - 7.22 Type-generic math <tgmath.h> (p: 335-337)

  - F.9.2.5 The sinh functions (p: 457)

- C89/C90 standard (ISO/IEC 9899:1990):

  - 4.5.3.2 The sinh function

### See also

cosh coshf coshl (C99)(C99) | computes hyperbolic cosine (ch(x)) (function)
tanh tanhf tanhl (C99)(C99) | computes hyperbolic tangent (function)
asinh asinhf asinhl (C99)(C99)(C99) | computes inverse hyperbolic sine (arsinh(x)) (function)
csinh csinhf csinhl (C99)(C99)(C99) | computes the complex hyperbolic sine (function)

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