/// <summary>Trigonometric Cosecant (csc, Cosekans) of this <c>Complex</c>.</summary>
public Complex Cosecant()
{
if (IsReal)
{
return(new Complex(Trig.Cosecant(real), 0d));
}
double sinr = Trig.Sine(real);
double sinhi = Trig.HyperbolicSine(imag);
double denom = sinr * sinr + sinhi * sinhi;
return(new Complex(sinr * Trig.HyperbolicCosine(imag) / denom, -Trig.Cosine(real) * sinhi / denom));
}
