sinh

sinh

Compute the Hyperbolic Sine

Portability: ISO/ANSI C conforming, UNIX compatible

SYNOPSIS
DESCRIPTION
RETURN VALUE
DIAGNOSTICS
EXAMPLE
RELATED FUNCTIONS
SEE ALSO

SYNOPSIS

#include <math.h>

double sinh(double x);

DESCRIPTION

sinh computes the hyperbolic sine of its argument x , expressed by this relation:

[IMAGE]

RETURN VALUE

sinh returns the principal value of the hyperbolic sine of the argument x , if this value is defined and computable. The return value is a double-precision, floating-point number.

DIAGNOSTICS

For a positive value of x that is too large, the sinh function returns HUGE_VAL . For a negative x value that is too large, sinh returns -HUGE_VAL . In both cases, the run-time library writes an error message to stderr (the standard error file).

If an error occurs in sinh , the _matherr routine is called. You can supply your own version of _matherr to suppress the diagnostic message or modify the value returned.

EXAMPLE

This example computes the hyperbolic cosecant of a value:

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

#define YRANG 1.30

main()
{
   double cosec_h;

      /* The hyperbolic cosecant of a value is 1      */
      /* divided by the hyperbolic sine of the value. */
   cosec_h = 1 / sinh(YRANG);
   printf("1 / sinh(%f) = %f\n", YRANG, cosec_h);
}

RELATED FUNCTIONS

cosh , _matherr , tanh

SEE ALSO

Mathematical Functions

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