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 Cot

 http://functions.wolfram.com/01.09.19.0008.01

 Input Form

 Im[Cot[z]] == Sinh[2 Im[z]]/(Cos[2 Re[z]] - Cosh[2 Im[z]])

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["Im", "[", RowBox[List["Cot", "[", "z", "]"]], "]"]], "\[Equal]", FractionBox[RowBox[List["Sinh", "[", RowBox[List["2", " ", RowBox[List["Im", "[", "z", "]"]]]], "]"]], RowBox[List[RowBox[List["Cos", "[", RowBox[List["2", " ", RowBox[List["Re", "[", "z", "]"]]]], "]"]], "-", RowBox[List["Cosh", "[", RowBox[List["2", " ", RowBox[List["Im", "[", "z", "]"]]]], "]"]]]]]]]]]

 MathML Form

 Im ( cot ( z ) ) sinh ( 2 Im ( z ) ) cos ( 2 Re ( z ) ) - cosh ( 2 Im ( z ) ) z 2 z 2 z -1 2 z -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Im", "[", RowBox[List["Cot", "[", "z_", "]"]], "]"]], "]"]], "\[RuleDelayed]", FractionBox[RowBox[List["Sinh", "[", RowBox[List["2", " ", RowBox[List["Im", "[", "z", "]"]]]], "]"]], RowBox[List[RowBox[List["Cos", "[", RowBox[List["2", " ", RowBox[List["Re", "[", "z", "]"]]]], "]"]], "-", RowBox[List["Cosh", "[", RowBox[List["2", " ", RowBox[List["Im", "[", "z", "]"]]]], "]"]]]]]]]]]

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

 2007-05-02