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http://functions.wolfram.com/01.24.19.0005.01
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Arg[Sech[x + I y]] ==
(1/2) ((Pi - (Pi Sign[Cos[y] Cosh[x]])/Sign[Cos[2 y] + Cosh[2 x]])
Sign[1/2 - Sign[Sin[y] Sinh[x]]/Sign[Cos[2 y] + Cosh[2 x]]] -
2 ArcTan[Tan[y] Tanh[x]])
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Cell[BoxData[RowBox[List[RowBox[List["Arg", "[", RowBox[List["Sech", "[", RowBox[List["x", "+", RowBox[List["\[ImaginaryI]", " ", "y"]]]], "]"]], "]"]], "\[Equal]", RowBox[List[FractionBox["1", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List[RowBox[List["(", RowBox[List["\[Pi]", "-", FractionBox[RowBox[List["\[Pi]", " ", RowBox[List["Sign", "[", RowBox[List[RowBox[List["Cos", "[", "y", "]"]], " ", RowBox[List["Cosh", "[", "x", "]"]]]], "]"]]]], RowBox[List["Sign", "[", RowBox[List[RowBox[List["Cos", "[", RowBox[List["2", " ", "y"]], "]"]], "+", RowBox[List["Cosh", "[", RowBox[List["2", " ", "x"]], "]"]]]], "]"]]]]], ")"]], " ", RowBox[List["Sign", "[", RowBox[List[FractionBox["1", "2"], "-", FractionBox[RowBox[List["Sign", "[", RowBox[List[RowBox[List["Sin", "[", "y", "]"]], " ", RowBox[List["Sinh", "[", "x", "]"]]]], "]"]], RowBox[List["Sign", "[", RowBox[List[RowBox[List["Cos", "[", RowBox[List["2", " ", "y"]], "]"]], "+", RowBox[List["Cosh", "[", RowBox[List["2", " ", "x"]], "]"]]]], "]"]]]]], "]"]]]], "-", RowBox[List["2", " ", RowBox[List["ArcTan", "[", RowBox[List[RowBox[List["Tan", "[", "y", "]"]], " ", RowBox[List["Tanh", "[", "x", "]"]]]], "]"]]]]]], ")"]]]]]]]]
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<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mrow> <mi> arg </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mi> sech </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mi> x </mi> <mo> + </mo> <mrow> <mi> ⅈ </mi> <mo> ⁢ </mo> <mi> y </mi> </mrow> </mrow> <mo> ) </mo> </mrow> <mo> ) </mo> </mrow> <mo> ⩵ </mo> <mrow> <mfrac> <mn> 1 </mn> <mn> 2 </mn> </mfrac> <mo> ⁢ </mo> <mrow> <mo> ( </mo> <mrow> <mrow> <mrow> <mo> ( </mo> <mrow> <mi> π </mi> <mo> - </mo> <mfrac> <mrow> <mi> π </mi> <mo> ⁢ </mo> <mrow> <mi> sgn </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mrow> <mi> cos </mi> <mo> ⁡ </mo> <mo> ( </mo> <mi> y </mi> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <mi> cosh </mi> <mo> ⁡ </mo> <mo> ( </mo> <mi> x </mi> <mo> ) </mo> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> <mrow> <mi> sgn </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mrow> <mi> cos </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mn> 2 </mn> <mo> ⁢ </mo> <mi> y </mi> </mrow> <mo> ) </mo> </mrow> <mo> + </mo> <mrow> <mi> cosh </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mn> 2 </mn> <mo> ⁢ </mo> <mi> x </mi> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> ) </mo> </mrow> </mfrac> </mrow> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <mi> sgn </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mfrac> <mn> 1 </mn> <mn> 2 </mn> </mfrac> <mo> - </mo> <mfrac> <mrow> <mi> sgn </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mrow> <mi> sin </mi> <mo> ⁡ </mo> <mo> ( </mo> <mi> y </mi> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <mi> sinh </mi> <mo> ⁡ </mo> <mo> ( </mo> <mi> x </mi> <mo> ) </mo> </mrow> </mrow> <mo> ) </mo> </mrow> <mrow> <mi> sgn </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mrow> <mi> cos </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mn> 2 </mn> <mo> ⁢ </mo> <mi> y </mi> </mrow> <mo> ) </mo> </mrow> <mo> + </mo> <mrow> <mi> cosh </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mn> 2 </mn> <mo> ⁢ </mo> <mi> x </mi> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> ) </mo> </mrow> </mfrac> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> - </mo> <mrow> <mn> 2 </mn> <mo> ⁢ </mo> <mrow> <msup> <mi> tan </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mrow> <mrow> <mi> tan </mi> <mo> ⁡ </mo> <mo> ( </mo> <mi> y </mi> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <mi> tanh </mi> <mo> ⁡ </mo> <mo> ( </mo> <mi> x </mi> <mo> ) </mo> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <arg /> <apply> <sech /> <apply> <plus /> <ci> x </ci> <apply> <times /> <imaginaryi /> <ci> y </ci> </apply> </apply> </apply> </apply> <apply> <times /> <cn type='rational'> 1 <sep /> 2 </cn> <apply> <plus /> <apply> <times /> <apply> <plus /> <pi /> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <times /> <pi /> <apply> <ci> Sign </ci> <apply> <times /> <apply> <cos /> <ci> y </ci> </apply> <apply> <cosh /> <ci> x </ci> </apply> </apply> </apply> <apply> <power /> <apply> <ci> Sign </ci> <apply> <plus /> <apply> <cos /> <apply> <times /> <cn type='integer'> 2 </cn> <ci> y </ci> </apply> </apply> <apply> <cosh /> <apply> <times /> <cn type='integer'> 2 </cn> <ci> x </ci> </apply> </apply> </apply> </apply> <cn type='integer'> -1 </cn> </apply> </apply> </apply> </apply> <apply> <ci> Sign </ci> <apply> <plus /> <cn type='rational'> 1 <sep /> 2 </cn> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <times /> <apply> <ci> Sign </ci> <apply> <times /> <apply> <sin /> <ci> y </ci> </apply> <apply> <sinh /> <ci> x </ci> </apply> </apply> </apply> <apply> <power /> <apply> <ci> Sign </ci> <apply> <plus /> <apply> <cos /> <apply> <times /> <cn type='integer'> 2 </cn> <ci> y </ci> </apply> </apply> <apply> <cosh /> <apply> <times /> <cn type='integer'> 2 </cn> <ci> x </ci> </apply> </apply> </apply> </apply> <cn type='integer'> -1 </cn> </apply> </apply> </apply> </apply> </apply> </apply> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <times /> <cn type='integer'> 2 </cn> <apply> <arctan /> <apply> <times /> <apply> <tan /> <ci> y </ci> </apply> <apply> <tanh /> <ci> x </ci> </apply> </apply> </apply> </apply> </apply> </apply> </apply> </apply> </annotation-xml> </semantics> </math>
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| Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Arg", "[", RowBox[List["Sech", "[", RowBox[List["x_", "+", RowBox[List["\[ImaginaryI]", " ", "y_"]]]], "]"]], "]"]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox["1", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List[RowBox[List["(", RowBox[List["\[Pi]", "-", FractionBox[RowBox[List["\[Pi]", " ", RowBox[List["Sign", "[", RowBox[List[RowBox[List["Cos", "[", "y", "]"]], " ", RowBox[List["Cosh", "[", "x", "]"]]]], "]"]]]], RowBox[List["Sign", "[", RowBox[List[RowBox[List["Cos", "[", RowBox[List["2", " ", "y"]], "]"]], "+", RowBox[List["Cosh", "[", RowBox[List["2", " ", "x"]], "]"]]]], "]"]]]]], ")"]], " ", RowBox[List["Sign", "[", RowBox[List[FractionBox["1", "2"], "-", FractionBox[RowBox[List["Sign", "[", RowBox[List[RowBox[List["Sin", "[", "y", "]"]], " ", RowBox[List["Sinh", "[", "x", "]"]]]], "]"]], RowBox[List["Sign", "[", RowBox[List[RowBox[List["Cos", "[", RowBox[List["2", " ", "y"]], "]"]], "+", RowBox[List["Cosh", "[", RowBox[List["2", " ", "x"]], "]"]]]], "]"]]]]], "]"]]]], "-", RowBox[List["2", " ", RowBox[List["ArcTan", "[", RowBox[List[RowBox[List["Tan", "[", "y", "]"]], " ", RowBox[List["Tanh", "[", "x", "]"]]]], "]"]]]]]], ")"]]]]]]]] |
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Date Added to functions.wolfram.com (modification date)
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