%0 Journal Article %A S. N. Sazonov %T A method of deriving the Wallis formula and of decomposition of hyperbolic functions into infinite products %J Matematičeskoe obrazovanie %D 2018 %P 40-43 %V 86 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MO_2018_86_2_a3/ %G ru %F MO_2018_86_2_a3