/// <summary>Trigonometric Hyperbolic Cosecant (Cosecans hyperbolicus) of this <c>Complex</c>.</summary>
public Complex Csch()
{
if (IsReal)
{
return(new Complex(Trig.Csch(real), 0d));
}
Complex exp = this.Exp();
return(2 * exp / (exp.Square() - 1));
}
