Question

Fie triunghiul dreptunghic ABC, cu m(<A) = 90° AB = 3 cm, AC = 4 cm, Aflati
BC. sin B, sin C,cos B,cos C,tgB,tgC,ctgC.​

Answer 1

Răspuns:

BC = √AB²+AC² = √9+16 = √25 = 5 cm

sinB = AB/BC = 3/5

sinC = AC/BC = 4/5

cosB = AC/BC = 4/5

cosC = AB/BC = 3/5

tgB = AC/AB = 4/3

tgC = AB/AC = 3/4

ctgB = AB/AC = 3/4

ctgC = AC/AB = 4/3