DLMF:4.21.E17 (Q1719)

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DLMF:4.21.E17
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    Statements

    Defining formula
    2 ⁢ sin ⁡ u ⁢ cos ⁡ v = sin ⁡ ( u - v ) + sin ⁡ ( u + v ) . 2 𝑢 𝑣 𝑢 𝑣 𝑢 𝑣 {\displaystyle{\displaystyle 2\sin u\cos v=\sin\left(u-v\right)+\sin\left(u+v% \right).}}
    0 references
    DLMF id
    DLMF:4.21.E17
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    Symbols used
    cosine function
    Defining formula
    cos ⁡ z 𝑧 {\displaystyle{\displaystyle\cos\NVar{z}}}
    xml-id
    C4.S14.E2.m2akdec
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    sine function
    Defining formula
    sin ⁡ z 𝑧 {\displaystyle{\displaystyle\sin\NVar{z}}}
    xml-id
    C4.S14.E1.m2ajdec
    0 references
     
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