DLMF:4.38.E19 (Q1969)

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DLMF:4.38.E19
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    Statements

    Defining formula
    Arctanh ⁡ u ± Arccoth ⁡ v = Arctanh ⁡ ( u ⁢ v ± 1 v ± u ) = Arccoth ⁡ ( v ± u u ⁢ v ± 1 ) . plus-or-minus multivalued-hyperbolic-inverse-tangent 𝑢 multivalued-hyperbolic-inverse-cotangent 𝑣 multivalued-hyperbolic-inverse-tangent plus-or-minus 𝑢 𝑣 1 plus-or-minus 𝑣 𝑢 multivalued-hyperbolic-inverse-cotangent plus-or-minus 𝑣 𝑢 plus-or-minus 𝑢 𝑣 1 {\displaystyle{\displaystyle\operatorname{Arctanh}u\pm\operatorname{Arccoth}v=% \operatorname{Arctanh}\left(\frac{uv\pm 1}{v\pm u}\right)=\operatorname{% Arccoth}\left(\frac{v\pm u}{uv\pm 1}\right).}}
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    DLMF id
    DLMF:4.38.E19
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