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http://functions.wolfram.com/01.12.16.0032.01
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ArcSin[x] + ArcSin[y] == ArcSin[y Sqrt[1 - x^2] + x Sqrt[1 - y^2]] /;
x y <= 0 || x^2 + y^2 <= 1
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Cell[BoxData[RowBox[List[RowBox[List[RowBox[List[RowBox[List["ArcSin", "[", "x", "]"]], "+", RowBox[List["ArcSin", "[", "y", "]"]]]], "\[Equal]", RowBox[List["ArcSin", "[", RowBox[List[RowBox[List["y", " ", SqrtBox[RowBox[List["1", "-", SuperscriptBox["x", "2"]]]]]], "+", RowBox[List["x", " ", SqrtBox[RowBox[List["1", "-", SuperscriptBox["y", "2"]]]]]]]], "]"]]]], "/;", RowBox[List[RowBox[List[RowBox[List["x", " ", "y"]], "\[LessEqual]", "0"]], "||", RowBox[List[RowBox[List[SuperscriptBox["x", "2"], "+", SuperscriptBox["y", "2"]]], "\[LessEqual]", "1"]]]]]]]]
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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> <mrow> <mrow> <msup> <mi> sin </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mi> x </mi> <mo> ) </mo> </mrow> <mo> + </mo> <mrow> <msup> <mi> sin </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mi> y </mi> <mo> ) </mo> </mrow> </mrow> <mo> ⩵ </mo> <mrow> <msup> <mi> sin </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mrow> <mrow> <mi> y </mi> <mo> ⁢ </mo> <msqrt> <mrow> <mn> 1 </mn> <mo> - </mo> <msup> <mi> x </mi> <mn> 2 </mn> </msup> </mrow> </msqrt> </mrow> <mo> + </mo> <mrow> <mi> x </mi> <mo> ⁢ </mo> <msqrt> <mrow> <mn> 1 </mn> <mo> - </mo> <msup> <mi> y </mi> <mn> 2 </mn> </msup> </mrow> </msqrt> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> /; </mo> <mrow> <mrow> <mrow> <mi> x </mi> <mo> ⁢ </mo> <mi> y </mi> </mrow> <mo> ≤ </mo> <mn> 0 </mn> </mrow> <mo> ∨ </mo> <mrow> <mrow> <msup> <mi> x </mi> <mn> 2 </mn> </msup> <mo> + </mo> <msup> <mi> y </mi> <mn> 2 </mn> </msup> </mrow> <mo> ≤ </mo> <mn> 1 </mn> </mrow> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <ci> Condition </ci> <apply> <eq /> <apply> <plus /> <apply> <arcsin /> <ci> x </ci> </apply> <apply> <arcsin /> <ci> y </ci> </apply> </apply> <apply> <arcsin /> <apply> <plus /> <apply> <times /> <ci> y </ci> <apply> <power /> <apply> <plus /> <cn type='integer'> 1 </cn> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <power /> <ci> x </ci> <cn type='integer'> 2 </cn> </apply> </apply> </apply> <cn type='rational'> 1 <sep /> 2 </cn> </apply> </apply> <apply> <times /> <ci> x </ci> <apply> <power /> <apply> <plus /> <cn type='integer'> 1 </cn> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <power /> <ci> y </ci> <cn type='integer'> 2 </cn> </apply> </apply> </apply> <cn type='rational'> 1 <sep /> 2 </cn> </apply> </apply> </apply> </apply> </apply> <apply> <or /> <apply> <leq /> <apply> <times /> <ci> x </ci> <ci> y </ci> </apply> <cn type='integer'> 0 </cn> </apply> <apply> <leq /> <apply> <plus /> <apply> <power /> <ci> x </ci> <cn type='integer'> 2 </cn> </apply> <apply> <power /> <ci> y </ci> <cn type='integer'> 2 </cn> </apply> </apply> <cn type='integer'> 1 </cn> </apply> </apply> </apply> </annotation-xml> </semantics> </math>
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| Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List[RowBox[List["ArcSin", "[", "x_", "]"]], "+", RowBox[List["ArcSin", "[", "y_", "]"]]]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["ArcSin", "[", RowBox[List[RowBox[List["y", " ", SqrtBox[RowBox[List["1", "-", SuperscriptBox["x", "2"]]]]]], "+", RowBox[List["x", " ", SqrtBox[RowBox[List["1", "-", SuperscriptBox["y", "2"]]]]]]]], "]"]], "/;", RowBox[List[RowBox[List[RowBox[List["x", " ", "y"]], "\[LessEqual]", "0"]], "||", RowBox[List[RowBox[List[SuperscriptBox["x", "2"], "+", SuperscriptBox["y", "2"]]], "\[LessEqual]", "1"]]]]]]]]]] |
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Date Added to functions.wolfram.com (modification date)
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