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http://functions.wolfram.com/01.10.16.0042.01
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Csc[a]^2 - Sec[b]^2 == Cos[a - b] Cos[a + b] Csc[a]^2 Sec[b]^2
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Cell[BoxData[RowBox[List[RowBox[List[SuperscriptBox[RowBox[List["Csc", "[", "a", "]"]], "2"], "-", SuperscriptBox[RowBox[List["Sec", "[", "b", "]"]], "2"]]], "\[Equal]", RowBox[List[RowBox[List["Cos", "[", RowBox[List["a", "-", "b"]], "]"]], " ", RowBox[List["Cos", "[", RowBox[List["a", "+", "b"]], "]"]], " ", SuperscriptBox[RowBox[List["Csc", "[", "a", "]"]], "2"], " ", SuperscriptBox[RowBox[List["Sec", "[", "b", "]"]], "2"]]]]]]]
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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> <msup> <mi> csc </mi> <mn> 2 </mn> </msup> <mo> ( </mo> <mi> a </mi> <mo> ) </mo> </mrow> <mo> - </mo> <mrow> <msup> <mi> sec </mi> <mn> 2 </mn> </msup> <mo> ( </mo> <mi> b </mi> <mo> ) </mo> </mrow> </mrow> <mo> ⩵ </mo> <mrow> <mrow> <mi> cos </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mi> a </mi> <mo> - </mo> <mi> b </mi> </mrow> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <mi> cos </mi> <mo> ⁡ </mo> <mo> ( </mo> <mrow> <mi> a </mi> <mo> + </mo> <mi> b </mi> </mrow> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <msup> <mi> csc </mi> <mn> 2 </mn> </msup> <mo> ( </mo> <mi> a </mi> <mo> ) </mo> </mrow> <mo> ⁢ </mo> <mrow> <msup> <mi> sec </mi> <mn> 2 </mn> </msup> <mo> ( </mo> <mi> b </mi> <mo> ) </mo> </mrow> </mrow> </mrow> <annotation-xml encoding='MathML-Content'> <apply> <eq /> <apply> <plus /> <apply> <power /> <apply> <csc /> <ci> a </ci> </apply> <cn type='integer'> 2 </cn> </apply> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <power /> <apply> <sec /> <ci> b </ci> </apply> <cn type='integer'> 2 </cn> </apply> </apply> </apply> <apply> <times /> <apply> <cos /> <apply> <plus /> <ci> a </ci> <apply> <times /> <cn type='integer'> -1 </cn> <ci> b </ci> </apply> </apply> </apply> <apply> <cos /> <apply> <plus /> <ci> a </ci> <ci> b </ci> </apply> </apply> <apply> <power /> <apply> <csc /> <ci> a </ci> </apply> <cn type='integer'> 2 </cn> </apply> <apply> <power /> <apply> <sec /> <ci> b </ci> </apply> <cn type='integer'> 2 </cn> </apply> </apply> </apply> </annotation-xml> </semantics> </math>
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| Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List[SuperscriptBox[RowBox[List["Csc", "[", "a_", "]"]], "2"], "-", SuperscriptBox[RowBox[List["Sec", "[", "b_", "]"]], "2"]]], "]"]], "\[RuleDelayed]", RowBox[List[RowBox[List["Cos", "[", RowBox[List["a", "-", "b"]], "]"]], " ", RowBox[List["Cos", "[", RowBox[List["a", "+", "b"]], "]"]], " ", SuperscriptBox[RowBox[List["Csc", "[", "a", "]"]], "2"], " ", SuperscriptBox[RowBox[List["Sec", "[", "b", "]"]], "2"]]]]]]] |
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Date Added to functions.wolfram.com (modification date)
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