Sagot :
bonjour
1 er triangle (celui de gauche :) )
cos(Â) = AC/AB
cos(Â) = 5.1/8.5
cos(Â) = 0.6
tan(B) = AC/BC
tan(B) = 5.1/6.8
tan(B) = 0.75
second triangle
cos(K) = KI/KJ
cos(K) = 4.16/5.2
cos(K) = 0.8
tan(J) = IK/IJ
tan(J) = 4.16/3.12
tan(J) ≅ 1.33