Cotanh​(AngouriMath.​Entity)

using System;
using static AngouriMath.MathS.Hyperbolic;

Console.WriteLine(Tanh("x"));
Console.WriteLine(Tanh("x").Substitute("x", 1.5).Evaled);
Console.WriteLine(Tanh("x").Substitute("x", 0.01).Evaled);
Console.WriteLine("-----------------------------");
Console.WriteLine(Cotanh("x"));
Console.WriteLine(Cotanh("x").Substitute("x", 1.5).Evaled);
Console.WriteLine(Cotanh("x").Substitute("x", 0.01).Evaled);

(e ^ (2 * x) - 1) / (e ^ (2 * x) + 1)
0.905148253644
0.009999666679
-----------------------------
(e ^ (2 * x) + 1) / (e ^ (2 * x) - 1)
1.104791392982
100.0033333111