Geodesic
A method of deriving the Wallis formula and of decomposition of hyperbolic functions into infinite products
Matematičeskoe obrazovanie, no. 2 (2018), pp. 40-43 Cet article a éte moissonné depuis la source Math-Net.Ru

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A simple method of decomposition of the hyperbolic tangent function into infinite product by the potential theory approach is suggested. This implies the famous Wallis formula.
Keywords: Hyperbolic tangent
Mots-clés : Wallis formula. 
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     title = {A method of deriving the {Wallis} formula and of decomposition of hyperbolic functions into infinite products},
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S. N. Sazonov. A method of deriving the Wallis formula and of decomposition of hyperbolic functions into infinite products. Matematičeskoe obrazovanie, no. 2 (2018), pp. 40-43. http://geodesic.mathdoc.fr/item/MO_2018_2_a3/

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