DLMF:4.21.E3 (Q1705)

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DLMF:4.21.E3
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    Statements

    test
    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% ,}}
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    DLMF id
    DLMF:4.21.E3
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