/// <summary>
/// Calculates the cosine of <paramref name="angle"/> in <paramref name="tri"/>.
/// </summary>
/// <param name="tri">The triangle</param>
/// <param name="angle">The angle to calculate.</param>
/// <returns>The cosine of <paramref name="angle"/>.</returns>
public static double Cosine(Triangle tri, TriangleAngle angle = TriangleAngle.C)
{
switch (angle)
{
case TriangleAngle.A:
return tri.SideA / tri.SideC;
default:
return tri.AngleB / tri.SideC;
}
}
/// <summary>
/// Calculates the tangent of <paramref name="angle"/> in <paramref name="tri"/>.
/// </summary>
/// <param name="tri">The triangle</param>
/// <param name="angle">The angle to calculate.</param>
/// <returns>The tangent of <paramref name="angle"/>.</returns>
public static double Tangent(Triangle tri, TriangleAngle angle = TriangleAngle.C)
{
switch (angle)
{
case TriangleAngle.A:
return tri.SideB / tri.SideA;
default:
return tri.AngleA / tri.SideB;
}
}
public void TriangleTest()
{
Triangle triangle = new Triangle(length:5, height:6);
Assert.AreEqual(5, triangle.SideA);
Assert.AreEqual(6, triangle.SideB);
Assert.AreEqual(15, triangle.Area);
RightTriangle triangle2 = new RightTriangle(5, 6);
Assert.AreEqual(triangle, triangle2);
Assert.AreEqual(triangle.Perimeter, triangle2.Perimeter);
Triangle triangle3 = new Triangle(sideB:4,sideC:5,angleC:90);
Assert.AreEqual(triangle3.Area, 6);
Assert.AreEqual(12, triangle3.Perimeter);
Triangle triangle4 = new Triangle(sideB: 3, sideC: 3, angleC: 60);
Assert.AreEqual(9, triangle4.Perimeter);
/*
try
{
Triangle wrongTriangle = new Triangle(1,6,10);
Assert.Fail("This triangle should've thrown an exception!");
}
catch (Mathos.Exceptions.InvalidTriangleException)
{
}
*/
}
/// <summary>
///
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public bool Equals(Triangle other)
{
return other != null && (Math.Abs(_sideA - other._sideA) < 1 && Math.Abs(_sideB - other._sideB) < 1 &&
Math.Abs(_sideC - other._sideC) < 1 && Math.Abs(_angleA - other._angleA) < 1 &&
Math.Abs(_angleB - other._angleB) < 1 && Math.Abs(_angleC - other._angleC) < 1);
}
