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