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ACOSH(3)	       FreeBSD Library Functions Manual		      ACOSH(3)

NAME
     acosh, acoshf, acoshl -- inverse hyperbolic cosine	functions

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     acosh(double x);

     float
     acoshf(float x);

     long double
     acoshl(long double	x);

DESCRIPTION
     The acosh(), acoshf(), and	acoshl() functions compute the inverse hyper-
     bolic cosine of the real argument x.  For a discussion of error due to
     roundoff, see math(3).

RETURN VALUES
     These functions return the	inverse	hyperbolic cosine of x.	 If the	argu-
     ment is less than 1, acosh() raises an invalid exception and returns an
     NaN.

SEE ALSO
     asinh(3), atanh(3), exp(3), fenv(3), math(3)

HISTORY
     The acosh(), acoshf(), and	acoshl() functions appeared in 4.3BSD,
     FreeBSD 2.0, and FreeBSD 10.0, respectively.

FreeBSD	11.2			 June 9, 2013			  FreeBSD 11.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | HISTORY

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