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 $[0,\pi]$. The result is undefined if $\left| x \right| > 1$.

VERSION SUPPORT

OpenGL Shading Language Version

Function Name

1.10

1.20

1.30

1.40

1.50

3.30

4.00

4.10

4.20

4.30

4.40

4.50

acos

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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/.