DLMF:4.21.E12 (Q1714)

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DLMF:4.21.E12
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    Statements

    Defining formula
    sin 2 ⁡ z + cos 2 ⁡ z = 1 , 2 𝑧 2 𝑧 1 {\displaystyle{\displaystyle{\sin^{2}}z+{\cos^{2}}z=1,}}
    0 references
    DLMF id
    DLMF:4.21.E12
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    Symbols used
    cosine function
    Defining formula
    cos ⁡ z 𝑧 {\displaystyle{\displaystyle\cos\NVar{z}}}
    xml-id
    C4.S14.E2.m2ahdec
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    sine function
    Defining formula
    sin ⁡ z 𝑧 {\displaystyle{\displaystyle\sin\NVar{z}}}
    xml-id
    C4.S14.E1.m2ahdec
    0 references
    Q11217
    Defining formula
    z 𝑧 {\displaystyle{\displaystyle z}}
    xml-id
    C4.S1.XMD8.m1dec
    0 references
     
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