DLMF:4.35.E15 (Q1889)

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DLMF:4.35.E15
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    Statements

    Defining formula
    2 ⁢ cosh ⁡ u ⁢ cosh ⁡ v = cosh ⁡ ( u + v ) + cosh ⁡ ( u - v ) , 2 𝑢 𝑣 𝑢 𝑣 𝑢 𝑣 {\displaystyle{\displaystyle 2\cosh u\cosh v=\cosh\left(u+v\right)+\cosh\left(% u-v\right),}}
    0 references
    DLMF id
    DLMF:4.35.E15
    0 references
    Symbols used
    hyperbolic cosine function
    Defining formula
    cosh ⁡ z 𝑧 {\displaystyle{\displaystyle\cosh\NVar{z}}}
    xml-id
    C4.S28.E2.m2aidec
    0 references
     
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