Question

Un triunghi dreptunghic are catetele de 12 si 16 cm sinusul unghiului care se opune catetei de 16 cm este egal cu

Answer 1

AB = 12 cm ; AC = 16 cm =>

BC² = AB²+AC² = 12²+16² = 144+ 256 = 400

BC = √400 = 20 cm

sin B = 16/20 = 4/5 = 0,8

Answer 2

BC²=AB²+AC²=>16²+BC²=>

BC²=16+12²=256+144=400=>

BC=$\sqrt{400}$=20 cm

$sin \: B = \frac{16}{20} = \frac{16 : 4}{20 : 4} = \frac{4}{5} = 0,8$