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 Tan

 http://functions.wolfram.com/01.08.27.0069.01

 Input Form

 Tan[z] == 1/Sqrt[-Csch[I z]^2 - 1] /; 0 < Re[z] < Pi/2

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["Tan", "[", "z", "]"]], "\[Equal]", FractionBox["1", SqrtBox[RowBox[List[RowBox[List["-", SuperscriptBox[RowBox[List["Csch", "[", RowBox[List["\[ImaginaryI]", " ", "z"]], "]"]], "2"]]], "-", "1"]]]]]], "/;", RowBox[List["0", "<", RowBox[List["Re", "[", "z", "]"]], "<", FractionBox["\[Pi]", "2"]]]]]]]

 MathML Form

 tan ( z ) 1 - csch 2 ( z ) - 1 /; 0 < Re ( z ) < π 2 Condition z 1 -1 z 2 -1 1 2 -1 0 z 2 -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Tan", "[", "z_", "]"]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox["1", SqrtBox[RowBox[List[RowBox[List["-", SuperscriptBox[RowBox[List["Csch", "[", RowBox[List["\[ImaginaryI]", " ", "z"]], "]"]], "2"]]], "-", "1"]]]], "/;", RowBox[List["0", "<", RowBox[List["Re", "[", "z", "]"]], "<", FractionBox["\[Pi]", "2"]]]]]]]]]

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

 2001-10-29