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DLMF:19.11#Ex14 - MaRDI portal

DLMF:19.11#Ex14 (Q6990)

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DLMF:19.11#Ex14
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    tan θ = tan ( 1 2 ψ ) 1 + cos ψ ( cos ψ ) + Δ ( ψ ) , 𝜃 1 2 𝜓 1 𝜓 𝜓 Δ 𝜓 {\displaystyle{\displaystyle\tan\theta=\tan\left(\tfrac{1}{2}\psi\right)\sqrt{% \frac{1+\cos\psi}{(\cos\psi)+\Delta(\psi)}},}}
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