DLMF:4.35.E11 (Q1885)

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DLMF:4.35.E11
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    Statements

    Defining formula
    cosh 2 ⁡ z - sinh 2 ⁡ z = 1 , 2 𝑧 2 𝑧 1 {\displaystyle{\displaystyle{\cosh^{2}}z-{\sinh^{2}}z=1,}}
    0 references
    DLMF id
    DLMF:4.35.E11
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    Symbols used
    hyperbolic cosine function
    Defining formula
    cosh ⁡ z 𝑧 {\displaystyle{\displaystyle\cosh\NVar{z}}}
    xml-id
    C4.S28.E2.m2agdec
    0 references
     
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