DLMF:18.5.E1 (Q5509)

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DLMF:18.5.E1
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    Statements

    Defining formula
    T n ⁡ ( x ) = cos ⁡ ( n ⁢ θ ) , Chebyshev-polynomial-first-kind-T 𝑛 𝑥 𝑛 𝜃 {\displaystyle{\displaystyle T_{n}\left(x\right)=\cos\left(n\theta\right),}}
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    DLMF id
    DLMF:18.5.E1
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