Use this function to compute arc cosine of x.
x
double SDL_acos(double x);
Returns arc cosine of x.
The definition of y = acos(x) is x = cos(y).
y = acos(x)
x = cos(y)
Domain: -1 <= x <= 1
-1 <= x <= 1
Range: 0 <= y <= Pi
0 <= y <= Pi
This function is available since SDL 2.0.2.
CategoryAPI