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

acos - return the arccosine of the parameter

genType acos(genType x);

x
Specify the value whose arccosine to return.

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

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

sin(), cos(), asin(), tan()

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 © 2011-2014 Khronos Group
07/25/2019 [FIXME: source]