Question

Triunghi ABC, A = 90°, AB = 12, AC = 5, Calculati sinC, sinB, cosB, cosC, tgB, ctgB​

Answer 1

Răspuns:

Aflii  BC cu pitagora

BC²=AB²+AC²

BC²=12²+5²

BC²=169

BC=√169=13

SinC=AB/BC=12/13

sin B=AC/BC=5/13

cos B=AB/BC=12/13

cos C=AC/BC=5/13

tgB=sinB/cosB=(5/13)/(12/13)=5/12

ctgB=1/tgB=12/5

Explicație pas cu pas: