ArcCos[x] - I ArcSinh[y] == (-((I ((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2]))/ Sqrt[((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2])^2])) ArcSinh[Sqrt[1 - x^2] y - I x Sqrt[1 + y^2]] + (Pi/2) (((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2])/ Sqrt[((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2])^2]) + Pi (1 + ((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2])/ Sqrt[((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2])^2]) Floor[(Pi - Arg[I x + Sqrt[1 - x^2]] - Arg[-y + Sqrt[1 + y^2]])/(2 Pi)] - Pi (1 - ((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2])/ Sqrt[((-I) x y + Sqrt[1 - x^2] Sqrt[1 + y^2])^2]) Floor[(Arg[I x + Sqrt[1 - x^2]] + Arg[-y + Sqrt[1 + y^2]])/(2 Pi)]

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</mtext> </mrow> <msqrt> <msup> <mrow> <mo> ( </mo> <mrow> <mrow> <msqrt> <mrow> <mn> 1 </mn> <mo> - </mo> <msup> <mi> x </mi> <mn> 2 </mn> </msup> </mrow> </msqrt> <mo> &#8290; </mo> <msqrt> <mrow> <msup> <mi> y </mi> <mn> 2 </mn> </msup> <mo> + </mo> <mn> 1 </mn> </mrow> </msqrt> </mrow> <mo> - </mo> <mrow> <mi> &#8520; </mi> <mo> &#8290; </mo> <mi> x </mi> <mo> &#8290; </mo> <mi> y </mi> </mrow> </mrow> <mo> ) </mo> </mrow> <mn> 2 </mn> </msup> </msqrt> </mfrac> </mrow> <mo> &#8290; </mo> <mrow> <msup> <mi> sinh </mi> <mrow> <mo> - </mo> <mn> 1 </mn> </mrow> </msup> <mo> ( </mo> <mrow> <mrow> <msqrt> <mrow> <mn> 1 </mn> <mo> - </mo> <msup> <mi> x </mi> <mn> 2 </mn> </msup> </mrow> </msqrt> <mo> &#8290; </mo> <mi> y </mi> </mrow> <mo> - </mo> <mrow> <mi> &#8520; </mi> <mo> &#8290; </mo> <mi> x </mi> <mo> &#8290; </mo> <msqrt> <mrow> <msup> <mi> y </mi> <mn> 2 </mn> </msup> <mo> + </mo> <mn> 1 </mn> </mrow> </msqrt> </mrow> </mrow> <mo> ) </mo> </mrow> </mrow> <mo> + </mo> <mrow> 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<ci> y </ci> </apply> </apply> </apply> <cn type='integer'> 2 </cn> </apply> <cn type='rational'> 1 <sep /> 2 </cn> </apply> <cn type='integer'> -1 </cn> </apply> </apply> <cn type='integer'> 1 </cn> </apply> <apply> <floor /> <apply> <times /> <apply> <plus /> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <arg /> <apply> <plus /> <apply> <times /> <imaginaryi /> <ci> x </ci> </apply> <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> </apply> <apply> <times /> <cn type='integer'> -1 </cn> <apply> <arg /> <apply> <plus /> <apply> <power /> <apply> <plus /> <apply> <power /> <ci> y </ci> <cn type='integer'> 2 </cn> </apply> <cn type='integer'> 1 </cn> </apply> <cn type='rational'> 1 <sep /> 2 </cn> </apply> <apply> <times /> <cn type='integer'> -1 </cn> <ci> y </ci> 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2007-05-02