ACOS(3G)                        [FIXME: manual]                       ACOS(3G)

NAME
       acos - return the arccosine of the parameter

DECLARATION
       genType acos(genType x);

PARAMETERS
       x
           Specify the value whose arccosine to return.

DESCRIPTION
       acos returns the angle whose trigonometric cosine is $x$. The range of
       values returned by acos is $[0,\pi]$. The result is undefined if
       $\left| x \right| > 1$.

VERSION SUPPORT

       +---------+------------------------------------------------------------------------------------------+
       |         |                             OpenGL Shading Language Version                              |
       +---------+------+------+------+------+------+------+------+------+------+------+------+------+------+
       |Function | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50 | 4.60 |
       |Name     |      |      |      |      |      |      |      |      |      |      |      |      |      |
       +---------+------+------+------+------+------+------+------+------+------+------+------+------+------+
       |acos     | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  | <?>  |
       +---------+------+------+------+------+------+------+------+------+------+------+------+------+------+

SEE ALSO
       sin(), cos(), asin(), tan()

COPYRIGHT
       Copyright (C) 2011-2014 Khronos Group. This material may be distributed
       subject to the terms and conditions set forth in the Open Publication
       License, v 1.0, 8 June 1999.  https://opencontent.org/openpub/.

COPYRIGHT
       Copyright (C) 2011-2014 Khronos Group

[FIXME: source]                   03/14/2026                          ACOS(3G)