hpux man page for acos

acos(3M)																  acos(3M)

NAME
       acos(), acosf(), acosl(), acosw(), acosq() - arccosine functions

SYNOPSIS
   HP Integrity Server Only
DESCRIPTION
       returns the arccosine of x,

       is a version of it takes a argument and returns a result.

   Integrity Server Only
       is a version of it takes a argument and returns a result.

       is an version of it takes an argument and returns an result.

       is equivalent to on HP-UX systems.

USAGE
       To use these functions compile either with the default option or with the and the options.

       To use (for Integrity servers) or compile also with the option.

       To use any of these functions, make sure your program includes and link in the math library by specifying on the compiler or linker command
       line.

       For more information, see the at the following site:

   PA-RISC System Only
       Millicode versions of the and functions are available.  Millicode versions of math library functions are usually faster than their counter-
       parts in the standard library.  To use these versions, compile your program with the or the optimization option.

       For special cases, the millicode versions return the values described in the section, but do not set

RETURN VALUE
       returns +0.

       If the magnitude of x is greater than one, returns NaN and raises the invalid exception.

       If x is NaN, returns NaN.

       When it raises no other exception, whether raises the inexact exception is unspecified.

ERRORS
       If the magnitude of x is greater than one, sets to [EDOM].

   Integrity Server Only
       HP-UX functions on Integrity server do not set by default.  For setting, compile with the option.

SEE ALSO
       acosd(3M), asin(3M), atan(3M), atan2(3M), cacos(3M), cos(3M), sin(3M), tan(3M), math(5).

STANDARDS CONFORMANCE
       : SVID3, XPG4.2, ANSI C, ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

       : ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arithmetic'')

																	  acos(3M)