using System; using System.Collections.Generic; using System.Linq; using System.Text; using V = Science.Mathematics.VectorCalculus; namespace VectorCalculus5Ed.Chapter1.Section2 { public class Example04 { public Example04() { } private string result; public string Result { get{return result;} } public void Compute() { V.Vector a = V.UnitVector.i + V.UnitVector.j + V.UnitVector.k; V.Vector b = V.UnitVector.i + V.UnitVector.j - V.UnitVector.k; V.Angle theta = new V.Angle(); double ans = theta.BetweenTwoVectors(a, b); result += ans.ToString() + "\r\n"; } } } // 1.23095941734077