using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using V = Science.Mathematics.VectorCalculus;

namespace VectorCalculus5Ed.Chapter6.Section2
{
    public class Example01
    {
        public Example01()
		{
		}
		private string result;
		public string Result
		{
			get{return result;}
		}
        public void Compute()
        {
            Science.Mathematics.Function.ToLastType<double[], double[]> f
                = new Science.Mathematics.Function.ToLastType<double[], double[]>(func);
            double[] at = { 2.0, 3.0 };
            V.JacobianDeterminant obj = new V.JacobianDeterminant(f,at);
            obj.Compute();
            result += obj.Result.ToString() + "\r\n";
        }
        private double[] func(double[] u)
        {
            double[] x = new double[2];
            x[0] = u[0] * Math.Cos(u[1]);
            x[1] = u[0] * Math.Sin(u[1]);
            return x;
        }
    }
}
/* 
2.00000000000035
*/