Question

fie triunghiul dreptunghic ABC cu m(A)=90 , AB=15 cm si AC=20cm. calculati: sinB,cosB,tgB,ctgB . URGENT VA ROG !!

Answer 1

BC^2=AB^2+AC^2(TEOREMA LUI PITAGORA)
BC^2=225+400
BC^2=625
BC^=25
sinB=AC/BC=20/25=4/5
cosB=AB/BC=15/25=3/5
tgB=AC/AB=20/15=4/3
ctgB=AB/AC=15/20=3/4