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NAME
       acos - return the arccosine of the parameter


DECLARATION

       genType acos(genType x);


PARAMETERS
       x
           Specify the value whose arccosine to return.


DESCRIPTION
       atan returns the angle whose trigonometric cosine is x. The range of values returned by acos is 0. The
       result is undefined if x1.


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 │
       │ Name     │      │      │      │      │      │      │      │      │      │      │      │      │
       ├──────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┤
       │ acos     │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │  ✔   │
       └──────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┘


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


COPYRIGHT
       Copyright © 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.  http://opencontent.org/openpub/.


COPYRIGHT
       Copyright © 2011-2014 Khronos Group

[FIXME: source]                                    07/22/2015                                           ACOS(3G)