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; }

 ArcSec

 http://functions.wolfram.com/01.18.16.0119.01

 Input Form

 a ArcSec[x] + b ArcSec[y] == (Pi (a + b))/2 - 2 I Pi (Floor[(-Arg[(Sqrt[1 - 1/x^2] + I/x)^(I a)] - Arg[(Sqrt[1 - 1/y^2] + I/y)^(I b)] + Pi)/(2 Pi)] + Floor[(Pi - Re[a Log[Sqrt[1 - 1/x^2] + I/x]])/(2 Pi)] + Floor[(Pi - Re[b Log[Sqrt[1 - 1/y^2] + I/y]])/(2 Pi)]) + I (1 - (-1)^(Floor[-(Arg[(Sqrt[1 - 1/y^2] + I/y)^(I b) (Sqrt[1 - 1/x^2] + I/x)^ (I a) + 1]/(2 Pi))] - Floor[-(Arg[(Sqrt[1 - 1/x^2] + I/x)^(I a) (Sqrt[1 - 1/y^2] + I/y)^ (I b)]/(2 Pi))])) Pi - I (-1)^(Floor[Arg[(Sqrt[1 - 1/x^2] + I/x)^(I a) (Sqrt[1 - 1/y^2] + I/y)^ (I b) - 1]/(2 Pi) - Arg[(Sqrt[1 - 1/y^2] + I/y)^(I b) (Sqrt[1 - 1/x^2] + I/x)^(I a) + 1]/ (2 Pi) + 1/2] + Floor[-(Arg[(Sqrt[1 - 1/x^2] + I/x)^(I a) (Sqrt[1 - 1/y^2] + I/y)^(I b)]/ Pi)]) ArcSec[(2 (Sqrt[1 - 1/x^2] + I/x)^(I a) (Sqrt[1 - 1/y^2] + I/y)^(I b))/((Sqrt[1 - 1/y^2] + I/y)^(2 I b) (Sqrt[1 - 1/x^2] + I/x)^(2 I a) + 1)]

 Standard Form

 Cell[BoxData[RowBox[List[" ", RowBox[List[RowBox[List[RowBox[List["a", " ", RowBox[List["ArcSec", "[", "x", "]"]]]], "+", RowBox[List["b", " ", RowBox[List["ArcSec", "[", "y", "]"]]]]]], "\[Equal]", RowBox[List[FractionBox[RowBox[List["\[Pi]", " ", RowBox[List["(", RowBox[List["a", "+", "b"]], ")"]]]], "2"], "-", RowBox[List["2", " ", "\[ImaginaryI]", " ", "\[Pi]", " ", RowBox[List["(", RowBox[List[RowBox[List["Floor", "[", FractionBox[RowBox[List[RowBox[List["-", RowBox[List["Arg", "[", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "a"]]], "]"]]]], "-", RowBox[List["Arg", "[", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "b"]]], "]"]], "+", "\[Pi]"]], RowBox[List["2", " ", "\[Pi]"]]], "]"]], "+", RowBox[List["Floor", "[", FractionBox[RowBox[List["\[Pi]", "-", RowBox[List["Re", "[", RowBox[List["a", " ", RowBox[List["Log", "[", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], "]"]]]], "]"]]]], RowBox[List["2", " ", "\[Pi]"]]], "]"]], "+", RowBox[List["Floor", "[", FractionBox[RowBox[List["\[Pi]", "-", RowBox[List["Re", "[", RowBox[List["b", " ", RowBox[List["Log", "[", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], "]"]]]], "]"]]]], RowBox[List["2", " ", "\[Pi]"]]], "]"]]]], ")"]]]], "+", RowBox[List["\[ImaginaryI]", " ", RowBox[List["(", RowBox[List["1", "-", SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], RowBox[List[RowBox[List["Floor", "[", RowBox[List["-", FractionBox[RowBox[List["Arg", "[", RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["(", 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RowBox[List["2", " ", "\[Pi]"]]]]], "]"]]]]]]], ")"]], " ", "\[Pi]"]], "-", RowBox[List["\[ImaginaryI]", " ", SuperscriptBox[RowBox[List["(", RowBox[List["-", "1"]], ")"]], RowBox[List[RowBox[List["Floor", "[", RowBox[List[FractionBox[RowBox[List["Arg", "[", RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "a"]]], " ", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "b"]]]]], "-", "1"]], "]"]], RowBox[List["2", " ", "\[Pi]"]]], "-", FractionBox[RowBox[List["Arg", "[", RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "b"]]], " ", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "a"]]]]], "+", "1"]], "]"]], RowBox[List["2", " ", "\[Pi]"]]], "+", FractionBox["1", "2"]]], "]"]], "+", RowBox[List["Floor", "[", RowBox[List["-", FractionBox[RowBox[List["Arg", "[", RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "a"]]], " ", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "b"]]]]], "]"]], "\[Pi]"]]], "]"]]]]], " ", RowBox[List["ArcSec", "[", FractionBox[RowBox[List["2", " ", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "a"]]], " ", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "b"]]]]], RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], ")"]], RowBox[List["2", " ", "\[ImaginaryI]", " ", "b"]]], " ", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], ")"]], RowBox[List["2", " ", "\[ImaginaryI]", " ", "a"]]]]], "+", "1"]]], "]"]]]]]]]]]]]]

 MathML Form

 a sec - 1 ( x ) + b sec - 1 ( y ) 1 2 π ( a + b ) - 2 π ( - arg ( ( 1 - 1 x 2 + x ) a ) - arg ( ( 1 - 1 y 2 + y ) b ) + π 2 π + π - Re ( a log ( 1 - 1 x 2 + x ) ) 2 π + π - Re ( b log ( 1 - 1 y 2 + y ) ) 2 π ) + ( 1 - ( - 1 ) - arg ( ( 1 - 1 y 2 + y ) b ( 1 - 1 x 2 + x ) a + 1 ) 2 π - - arg ( ( 1 - 1 x 2 + x ) a ( 1 - 1 y 2 + y ) b ) 2 π ) π - ( - 1 ) arg ( ( 1 - 1 x 2 + x ) a ( 1 - 1 y 2 + y ) b - 1 ) 2 π + 1 2 - arg ( ( 1 - 1 y 2 + y ) b ( 1 - 1 x 2 + x ) a + 1 ) 2 π + - arg ( ( 1 - 1 x 2 + x ) a ( 1 - 1 y 2 + y ) b ) π sec - 1 ( 2 ( 1 - 1 x 2 + x ) a ( 1 - 1 y 2 + y ) b ( 1 - 1 y 2 + y ) 2 b ( 1 - 1 x 2 + x ) 2 a + 1 ) a x b y 1 2 a b -1 2 -1 1 -1 1 x 2 -1 1 2 x -1 a -1 1 -1 1 y 2 -1 1 2 y -1 b 2 -1 -1 a 1 -1 1 x 2 -1 1 2 x -1 2 -1 -1 b 1 -1 1 y 2 -1 1 2 y -1 2 -1 1 -1 -1 -1 1 -1 1 y 2 -1 1 2 y -1 b 1 -1 1 x 2 -1 1 2 x -1 a 1 2 -1 -1 -1 1 -1 1 x 2 -1 1 2 x -1 a 1 -1 1 y 2 -1 1 2 y -1 b 2 -1 -1 -1 1 -1 1 x 2 -1 1 2 x -1 a 1 -1 1 y 2 -1 1 2 y -1 b -1 2 -1 1 2 -1 1 -1 1 y 2 -1 1 2 y -1 b 1 -1 1 x 2 -1 1 2 x -1 a 1 2 -1 -1 1 -1 1 x 2 -1 1 2 x -1 a 1 -1 1 y 2 -1 1 2 y -1 b -1 2 1 -1 1 x 2 -1 1 2 x -1 a 1 -1 1 y 2 -1 1 2 y -1 b 1 -1 1 y 2 -1 1 2 y -1 2 b 1 -1 1 x 2 -1 1 2 x -1 2 a 1 -1 [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List[RowBox[List["a_", " ", RowBox[List["ArcSec", "[", "x_", "]"]]]], "+", RowBox[List["b_", " ", RowBox[List["ArcSec", "[", "y_", "]"]]]]]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List[FractionBox["1", "2"], " ", "\[Pi]", " ", RowBox[List["(", RowBox[List["a", "+", "b"]], ")"]]]], "-", RowBox[List["2", " ", "\[ImaginaryI]", " ", "\[Pi]", " ", RowBox[List["(", RowBox[List[RowBox[List["Floor", "[", FractionBox[RowBox[List[RowBox[List["-", RowBox[List["Arg", "[", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["x", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "x"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "a"]]], "]"]]]], "-", RowBox[List["Arg", "[", SuperscriptBox[RowBox[List["(", RowBox[List[SqrtBox[RowBox[List["1", "-", FractionBox["1", SuperscriptBox["y", "2"]]]]], "+", FractionBox["\[ImaginaryI]", "y"]]], ")"]], RowBox[List["\[ImaginaryI]", " ", "b"]]], 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 Date Added to functions.wolfram.com (modification date)

 2007-05-02