ArcCsc[z/Sqrt[z^2 - 1]] == Sqrt[z^2] Sqrt[1/z^2] (Sqrt[(z - 1)/z]/Sqrt[(1 - z)/z]) ArcSech[z] + (Pi/2) (Sqrt[z^2]/z - Sqrt[z^2] Sqrt[1/z^2])

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2003-08-21