%0 Journal Article %A A. N. Afanasyev %T Trigonometry and problem solving in geometry %J Matematičeskoe obrazovanie %D 2022 %P 12-20 %V 101 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MO_2022_101_1_a2/ %G ru %F MO_2022_101_1_a2