public static Rational Exsec(Rational radian)
{
var result = TriangleFunctionTest.Sec(radian);
result.Numerator -= result.Denominator;
return(result);
}
public static Rational Crd(Rational radian)
{
var versin = TriangleFunctionTest.Versin(radian);
var sin = Math.Sin(radian);
//TODO:小さな値の冪根はニュートン法との相性が悪い為、できれば冪根を使いたくない。
return(Math.Sqrt(versin * versin + sin * sin));
}
