public static FInt Asin(FInt F)
{
bool isNegative = F < 0;
F = Abs(F);
if (F > FInt.OneF)
{
throw new ArithmeticException("Bad Asin Input:" + F.ToDouble());
}
FInt f1 = mul(mul(mul(mul(FInt.Create(145103 >> FInt.SHIFT_AMOUNT, false), F) -
FInt.Create(599880 >> FInt.SHIFT_AMOUNT, false), F) +
FInt.Create(1420468 >> FInt.SHIFT_AMOUNT, false), F) -
FInt.Create(3592413 >> FInt.SHIFT_AMOUNT, false), F) +
FInt.Create(26353447 >> FInt.SHIFT_AMOUNT, false);
FInt f2 = PI / FInt.Create(2, true) - (Sqrt(FInt.OneF - F) * f1);
return(isNegative ? f2.Inverse : f2);
}
