DLMF:4.42.E3 (Q1991)

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DLMF:4.42.E3
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    Statements

    Defining formula
    tan ⁡ A = a b = 1 cot ⁡ A . 𝐴 𝑎 𝑏 1 𝐴 {\displaystyle{\displaystyle\tan A=\frac{a}{b}=\frac{1}{\cot A}.}}
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    DLMF id
    DLMF:4.42.E3
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    Symbols used
    cotangent function
    Defining formula
    cot ⁡ z 𝑧 {\displaystyle{\displaystyle\cot\NVar{z}}}
    xml-id
    C4.S14.E7.m2adec
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    tangent function
    Defining formula
    tan ⁡ z 𝑧 {\displaystyle{\displaystyle\tan\NVar{z}}}
    xml-id
    C4.S14.E4.m2adec
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