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 Tanh

 http://functions.wolfram.com/01.21.02.0001.01

 Input Form

 Tanh[z] == Sinh[z]/Cosh[z] == (E^z - E^(-z))/(E^z + E^(-z))

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["Tanh", "[", "z", "]"]], "\[Equal]", FractionBox[RowBox[List["Sinh", "[", "z", "]"]], RowBox[List["Cosh", "[", "z", "]"]]], "\[Equal]", FractionBox[RowBox[List[SuperscriptBox["\[ExponentialE]", "z"], "-", SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z"]]]]], RowBox[List[SuperscriptBox["\[ExponentialE]", "z"], "+", SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z"]]]]]]]]]]

 MathML Form

 tanh ( z ) sinh ( z ) cosh ( z ) z - - z z + - z z z z -1 z -1 -1 z z -1 z -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["Tanh", "[", "z", "]"]], "\[Equal]", FractionBox[RowBox[List["Sinh", "[", "z", "]"]], RowBox[List["Cosh", "[", "z", "]"]]], "\[Equal]", FractionBox[RowBox[List[SuperscriptBox["\[ExponentialE]", "z"], "-", SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z"]]]]], RowBox[List[SuperscriptBox["\[ExponentialE]", "z"], "+", SuperscriptBox["\[ExponentialE]", RowBox[List["-", "z"]]]]]]]]]]

 Date Added to functions.wolfram.com (modification date)

 2001-10-29