Réponse :
EX1 Calculer EF
sin (^DEF) = 5/EF ⇔ EF = 5/sin(^DEF) ⇔ EF = 5/sin 30°
EX2 calculer FD
tan (^DEF) = 5/FD ⇔ FD = 5/tan(^DEF) ⇔ FD = 5/tan 40°
EX3 calculer LK
cos(^DKL) = DK/LK ⇔ LK = DK/cos(^DKL) ⇔ LK = 7/cos 50°
EX4 calculer LP
sin (^LMP) = LP/LM ⇔ LP = LM x sin (^LMP) ⇔ LP = 7 x sin 50°
Explications étape par étape
