public static Real ArcCos(this Real x)
{
Real output = new Real(Math.Acos(x.data));
switch (Config.handle.AngleMode)
{
case Config.Mode.Radians: return(output);
case Config.Mode.Degrees: return(output.ToDegrees(Config.Mode.Radians));
case Config.Mode.Grad: return(output.ToGrad(Config.Mode.Radians));
default: throw new ArgumentException();
}
}
