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 ArcCosh

 http://functions.wolfram.com/01.26.27.1962.01

 Input Form

 ArcCosh[(1 + z)/(1 - z)] == Pi Sqrt[z] Sqrt[-(1/z)] + 2 ArcCoth[Sqrt[z]]

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["ArcCosh", "[", FractionBox[RowBox[List["1", "+", "z"]], RowBox[List["1", "-", "z"]]], "]"]], "\[Equal]", RowBox[List[RowBox[List["\[Pi]", " ", SqrtBox["z"], SqrtBox[RowBox[List["-", FractionBox["1", "z"]]]]]], "+", RowBox[List["2", RowBox[List["ArcCoth", "[", SqrtBox["z"], "]"]]]]]]]]]]

 MathML Form

 cosh - 1 ( 1 + z 1 - z ) 2 coth - 1 ( z ) + π - 1 z z 1 z 1 -1 z -1 2 z 1 2 -1 1 z -1 1 2 z 1 2 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["ArcCosh", "[", FractionBox[RowBox[List["1", "+", "z_"]], RowBox[List["1", "-", "z_"]]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["\[Pi]", " ", SqrtBox["z"], " ", SqrtBox[RowBox[List["-", FractionBox["1", "z"]]]]]], "+", RowBox[List["2", " ", RowBox[List["ArcCoth", "[", SqrtBox["z"], "]"]]]]]]]]]]

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

 2003-08-21