html, body, form { margin: 0; padding: 0; width: 100%; } #calculate { position: relative; width: 177px; height: 110px; background: transparent url(/images/alphabox/embed_functions_inside.gif) no-repeat scroll 0 0; } #i { position: relative; left: 18px; top: 44px; width: 133px; border: 0 none; outline: 0; font-size: 11px; } #eq { width: 9px; height: 10px; background: transparent; position: absolute; top: 47px; right: 18px; cursor: pointer; }

 Cos

 http://functions.wolfram.com/01.07.27.0042.01

 Input Form

 Cos[z] == (1 + Tanh[(I z)/2]^2)/(1 - Tanh[(I z)/2]^2)

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List["Cos", "[", "z", "]"]], "\[Equal]", FractionBox[RowBox[List["1", "+", SuperscriptBox[RowBox[List["Tanh", "[", FractionBox[RowBox[List["\[ImaginaryI]", " ", "z"]], "2"], "]"]], "2"]]], RowBox[List["1", "-", SuperscriptBox[RowBox[List["Tanh", "[", FractionBox[RowBox[List["\[ImaginaryI]", " ", "z"]], "2"], "]"]], "2"]]]]]]]]

 MathML Form

 cos ( z ) 1 + tanh 2 ( z 2 ) 1 - tanh 2 ( z 2 ) z 1 z 2 -1 2 1 -1 z 2 -1 2 -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Cos", "[", "z_", "]"]], "]"]], "\[RuleDelayed]", FractionBox[RowBox[List["1", "+", SuperscriptBox[RowBox[List["Tanh", "[", FractionBox[RowBox[List["\[ImaginaryI]", " ", "z"]], "2"], "]"]], "2"]]], RowBox[List["1", "-", SuperscriptBox[RowBox[List["Tanh", "[", FractionBox[RowBox[List["\[ImaginaryI]", " ", "z"]], "2"], "]"]], "2"]]]]]]]]

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

 2001-10-29