Arg[3 I] == Pi/2
Cell[BoxData[RowBox[List[RowBox[List["Arg", "[", RowBox[List["3", "\[ImaginaryI]"]], "]"]], "\[Equal]", FractionBox["\[Pi]", "2"]]]]]
<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> <mn> 3 </mn> <mo> ⁢ </mo> <mi> ⅈ </mi> </mrow> <mo> ) </mo> </mrow> <mo> ⩵ </mo> <mfrac> <mi> π </mi> <mn> 2 </mn> </mfrac> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <arg /> <apply> <times /> <cn type='integer'> 3 </cn> <imaginaryi /> </apply> </apply> <apply> <times /> <pi /> <apply> <power /> <cn type='integer'> 2 </cn> <cn type='integer'> -1 </cn> </apply> </apply> </apply> </annotation-xml> </semantics> </math>
Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Arg", "[", RowBox[List["3", " ", "\[ImaginaryI]"]], "]"]], "]"]], "\[RuleDelayed]", FractionBox["\[Pi]", "2"]]]]]
2001-10-29
){kind=small}
