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Triungi dreptungic ABC are m < B = 90 ° AM = 3 cm, tg ( < C ) = 1 / 2, aflati lungimea laturilor BC si AC

Răspuns :

daca tgC=1/2 ⇒  tgC=AB/BC   deci   3/BC = 1/2   de unde  BC= (2*3):1=6cm ;
conform T.Pitagora ⇒ AC = √(3² +6²)= √45 = 3√5 cm ;