Exercice 44 page 230 - Manuel Sesamath
RT = 6×4+(?2)×8 = 8. RS = ?62 +(?2)2 = 40 = 2 10 et RT = 42 +82 = 80 = 4 5. b) On a donc 8 = 2 10×4 5×cos( ?. SRT), d'où cos(.
RT = 6×4+(?2)×8 = 8. RS = ?62 +(?2)2 = 40 = 2 10 et RT = 42 +82 = 80 = 4 5. b) On a donc 8 = 2 10×4 5×cos( ?. SRT), d'où cos(.