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 Sin

 http://functions.wolfram.com/01.06.27.0008.01

 Input Form

 Sin[z] == (Sqrt[z^2]/z) Sqrt[(1 - Cos[2 z])/2] /; Abs[Re[z]] < Pi

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[RowBox[List["Sin", "[", "z", "]"]], "\[Equal]", RowBox[List[FractionBox[RowBox[List[SqrtBox[SuperscriptBox["z", "2"]], " "]], "z"], " ", SqrtBox[FractionBox[RowBox[List["1", "-", RowBox[List["Cos", "[", RowBox[List["2", "z"]], "]"]]]], "2"]]]]]], " ", "/;", RowBox[List[RowBox[List["Abs", "[", RowBox[List["Re", "[", "z", "]"]], "]"]], "<", "\[Pi]"]]]]]]

 MathML Form

 sin ( z ) z 2 z 1 - cos ( 2 z ) 2 /; "\[LeftBracketingBar]" Re ( z ) "\[RightBracketingBar]" < π Condition z z 2 1 2 z -1 1 -1 2 z 2 -1 1 2 z [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Sin", "[", "z_", "]"]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox[RowBox[List[SqrtBox[SuperscriptBox["z", "2"]], " ", SqrtBox[RowBox[List[FractionBox["1", "2"], " ", RowBox[List["(", RowBox[List["1", "-", RowBox[List["Cos", "[", RowBox[List["2", " ", "z"]], "]"]]]], ")"]]]]]]], "z"], "/;", RowBox[List[RowBox[List["Abs", "[", RowBox[List["Re", "[", "z", "]"]], "]"]], "<", "\[Pi]"]]]]]]]]

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

 2001-10-29

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