Ipotenuza BC=10 cm(numere pitagorice 6,8,10)
sin B = ac/bc=6/10=3/5
cos B = ab/bc =8/10=4/5
tg B= ac/ab=6/8=3/4
ctg B = 1/tg B = 4/3
---------------------------
sin C = ab/bc = 8/10 = 4/5
cos C = sin(90° - C) = sin B = 3/5(ti-am aratat aici o alta varianta de calcul in locul aceleia de a aplica definitia pt cos)
tg C= sin C / cos C = 4/5 *5/3 = 4/3
ctg C = 1/ tg C = 3/4
----------------------------------
