Degree == (1/45) (ArcTan[1/8] + ArcTan[1/5] + ArcTan[1/2])

Cell[BoxData[RowBox[List["Degree", "\[Equal]", RowBox[List[FractionBox["1", "45"], " ", RowBox[List["(", RowBox[List[RowBox[List["ArcTan", "[", FractionBox["1", "8"], "]"]], "+", RowBox[List["ArcTan", "[", FractionBox["1", "5"], "]"]], "+", RowBox[List["ArcTan", "[", FractionBox["1", "2"], "]"]]]], ")"]]]]]]]]

<math xmlns='http://www.w3.org/1998/Math/MathML' mathematica:form='TraditionalForm' xmlns:mathematica='http://www.wolfram.com/XML/'> <semantics> <mrow> <mo> &#176; </mo> <mo> &#10869; </mo> <mrow> <mfrac> <mn> 1 </mn> <mn> 45 </mn> </mfrac> <mo> &#8290; </mo> <mrow> <mo> ( </mo> <mrow> <mrow> <msup> <mi> tan </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mfrac> <mn> 1 </mn> <mn> 2 </mn> </mfrac> <mo> ) </mo> </mrow> <mo> + </mo> <mrow> <msup> <mi> tan </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mfrac> <mn> 1 </mn> <mn> 5 </mn> </mfrac> <mo> ) </mo> </mrow> <mo> + </mo> <mrow> <msup> <mi> tan </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mfrac> <mn> 1 </mn> <mn> 8 </mn> </mfrac> <mo> ) </mo> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <ci> Degree </ci> <apply> <times /> <cn type='rational'> 1 <sep /> 45 </cn> <apply> <plus /> <apply> <arctan /> <cn type='rational'> 1 <sep /> 2 </cn> </apply> <apply> <arctan /> <cn type='rational'> 1 <sep /> 5 </cn> </apply> <apply> <arctan /> <cn type='rational'> 1 <sep /> 8 </cn> </apply> </apply> </apply> </apply> </annotation-xml> </semantics> </math>

Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", "\[Degree]", "]"]], "\[RuleDelayed]", RowBox[List[FractionBox["1", "45"], " ", RowBox[List["(", RowBox[List[RowBox[List["ArcTan", "[", FractionBox["1", "8"], "]"]], "+", RowBox[List["ArcTan", "[", FractionBox["1", "5"], "]"]], "+", RowBox[List["ArcTan", "[", FractionBox["1", "2"], "]"]]]], ")"]]]]]]]]

2007-05-02