DLMF:22.6.E15 (Q6949)

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Language	Label	Description	Also known as
English	DLMF:22.6.E15	No description defined

Statements

{\displaystyle{\displaystyle\operatorname{ds}\left(2z,k\right)=\frac{k^{2}{k^{% \prime}}^{2}+{\operatorname{ds}^{4}}\left(z,k\right)}{2\operatorname{cs}\left(% z,k\right)\operatorname{ds}\left(z,k\right)\operatorname{ns}\left(z,k\right)},}}

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DLMF:22.6.E15

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