Répondre :
Dans le triangle SAH rectangle en H :
tan(ASH) = AH/SH
tan(35) = AH/30
AH = 30tan(35)
AH 21m.
b) 21m + 1,75 = 22,75m
BAH=90°-35°=55
cos(ABH) = BH/BA
cos(35) = 30/BA
BA = 30/cos(35)
BA 36,6 m.
cos(55) = AH/36,6
AH = 36,6/cos(35)
AH = 44,7 m.
tan(ASH) = AH/SH
tan(35) = AH/30
AH = 30tan(35)
AH 21m.
b) 21m + 1,75 = 22,75m
BAH=90°-35°=55
cos(ABH) = BH/BA
cos(35) = 30/BA
BA = 30/cos(35)
BA 36,6 m.
cos(55) = AH/36,6
AH = 36,6/cos(35)
AH = 44,7 m.