DLMF:4.21.E11 (Q1713)

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DLMF:4.21.E11
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    Statements

    Defining formula
    cot ⁡ u ± cot ⁡ v = sin ⁡ ( v ± u ) sin ⁡ u ⁢ sin ⁡ v . plus-or-minus 𝑢 𝑣 plus-or-minus 𝑣 𝑢 𝑢 𝑣 {\displaystyle{\displaystyle\cot u\pm\cot v=\frac{\sin\left(v\pm u\right)}{% \sin u\sin v}.}}
    0 references
    DLMF id
    DLMF:4.21.E11
    0 references
    Symbols used
    cotangent function
    Defining formula
    cot ⁡ z 𝑧 {\displaystyle{\displaystyle\cot\NVar{z}}}
    xml-id
    C4.S14.E7.m2aadec
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    sine function
    Defining formula
    sin ⁡ z 𝑧 {\displaystyle{\displaystyle\sin\NVar{z}}}
    xml-id
    C4.S14.E1.m2agdec
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