Bonjour aidez moi aux exercices 3 et 4 svp

2) sin 52° = BC/AC ⇒ AC = BC/sin 52° = 8/0.788 = 10.15 cm  soit AC = 10.2 cm

3) cos 59° = EF/FG ⇒ EF = FG x cos 59° = 7.5 x 0.515 = 3.96 cm  soit EF = 3.9 cm

4) tan 20° = LM/KM ⇒ LM = KM x tan 20° = 5.4 x 0.3639 = 1.96 cm