| private Cos_Basic ( double real, double imaginary ) : void | ||
| real | double | |
| imaginary | double | |
| return | void | |
public static void Cos_Basic(double real, double imaginary)
{
// The product formula: cos (x+iy) = cos(x)*cosh(y) - isin(x)sinh(y)
// The verification formula: cos (z) = (Complex.Exp(i*z) + Complex.Exp(-i*z)) / 2
// The verification formula is used not for the boundary values
var complex = new Complex(real, imaginary);
Complex temp = Complex.ImaginaryOne * complex;
Complex expected = (Complex.Exp(temp) + Complex.Exp(-temp)) / 2;
Cos_Advanced(real, imaginary, expected.Real, expected.Imaginary);
}