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ACOSH(3)		   Linux Programmer's Manual		      ACOSH(3)

NAME
       acosh - inverse hyperbolic cosine function

SYNOPSIS
       #include	<math.h>

       double acosh(double x);

DESCRIPTION
       The  acosh()  function  calculates  the inverse hyperbolic cosine of x;
       that is the value whose hyperbolic cosine is x.	If x is	less than 1.0,
       acosh() returns not-a-number (NaN) and errno is set.

ERRORS
       EDOM   x	is out of range.

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       asinh(3), atanh(3), cosh(3), sinh(3), tanh(3)

				  1993-06-13			      ACOSH(3)

NAME | SYNOPSIS | DESCRIPTION | ERRORS | CONFORMING TO | SEE ALSO

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