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DLMF:36.4#Ex11 - MaRDI portal

DLMF:36.4#Ex11 (Q10579)

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DLMF:36.4#Ex11
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    x = 1 3 z 2 ( - cos ( 2 ϕ ) - 2 cos ϕ ) , 𝑥 1 3 superscript 𝑧 2 2 italic-ϕ 2 italic-ϕ {\displaystyle{\displaystyle x=\tfrac{1}{3}z^{2}(-\cos\left(2\phi\right)-2\cos% \phi),}}
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