DLMF:4.18.E8 (Q1676)

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DLMF:4.18.E8
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    Statements

    Defining formula
    | cos ⁡ z | ≤ cosh ⁡ | z | , 𝑧 𝑧 {\displaystyle{\displaystyle|\cos z|\leq\cosh|z|,}}
    0 references
    DLMF id
    DLMF:4.18.E8
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    Symbols used
    cosine function
    Defining formula
    cos ⁡ z 𝑧 {\displaystyle{\displaystyle\cos\NVar{z}}}
    xml-id
    C4.S14.E2.m2abdec
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    hyperbolic cosine function
    Defining formula
    cosh ⁡ z 𝑧 {\displaystyle{\displaystyle\cosh\NVar{z}}}
    xml-id
    C4.S28.E2.m2abdec
    0 references
    Q11217
    Defining formula
    z 𝑧 {\displaystyle{\displaystyle z}}
    xml-id
    C4.S1.XMD8.m1cdec
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