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README.md
Acos
Return the arccosine of the parameter
Declaration
float acos(float x)
vec2 acos(vec2 x)
vec3 acos(vec3 x)
vec4 acos(vec4 x)
Parameters
x specify the value whose arccosine to return.
Description
acos() returns the angle whose trigonometric cosine is x.
See Also
cos(), sin(), asin(), tan(), atan(), Chapter 05: Shaping Functions