DLMF:4.21.E3 (Q1705)

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DLMF:4.21.E3
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    Statements

    Defining formula
    cos ⁡ ( u ± v ) = cos ⁡ u ⁢ cos ⁡ v ∓ sin ⁡ u ⁢ sin ⁡ v , plus-or-minus 𝑢 𝑣 minus-or-plus 𝑢 𝑣 𝑢 𝑣 {\displaystyle{\displaystyle\cos\left(u\pm v\right)=\cos u\cos v\mp\sin u\sin v% ,}}
    0 references
    DLMF id
    DLMF:4.21.E3
    0 references
    Symbols used
    cosine function
    Defining formula
    cos ⁡ z 𝑧 {\displaystyle{\displaystyle\cos\NVar{z}}}
    xml-id
    C4.S14.E2.m2abdec
    0 references
    sine function
    Defining formula
    sin ⁡ z 𝑧 {\displaystyle{\displaystyle\sin\NVar{z}}}
    xml-id
    C4.S14.E1.m2abdec
    0 references
     
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