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http://functions.wolfram.com/01.07.03.0158.01
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Cos[(-I) Infinity] == Infinity
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Cell[BoxData[RowBox[List[RowBox[List["Cos", "[", RowBox[List[RowBox[List["-", "\[ImaginaryI]"]], " ", "\[Infinity]"]], "]"]], "\[Equal]", "\[Infinity]"]]]]
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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> cos </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mrow> <mo> - </mo> <mi> ⅈ </mi> </mrow> <mo> ⁢ </mo> <mi> ∞ </mi> </mrow> <mo> ) </mo> </mrow> <mo> ⩵ </mo> <mi> ∞ </mi> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <cos /> <apply> <times /> <apply> <times /> <cn type='integer'> -1 </cn> <imaginaryi /> </apply> <infinity /> </apply> </apply> <infinity /> </apply> </annotation-xml> </semantics> </math>
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| Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List["Cos", "[", RowBox[List[RowBox[List["-", "\[ImaginaryI]"]], " ", "\[Infinity]"]], "]"]], "]"]], "\[RuleDelayed]", "\[Infinity]"]]]] |
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Date Added to functions.wolfram.com (modification date)
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