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DLMF:19.11#Ex2 - MaRDI portal

DLMF:19.11#Ex2 (Q6970)

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DLMF:19.11#Ex2
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    Δ ( θ ) = 1 - k 2 sin 2 θ . Δ 𝜃 1 superscript 𝑘 2 2 𝜃 {\displaystyle{\displaystyle\Delta(\theta)=\sqrt{1-k^{2}{\sin^{2}}\theta}.}}
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