Respuesta :

bcalle
# 19
Letter D
tan 30 = opp/adj Should be set up as tan 30 = 72/CD

# 20
EG = DH = 11
EFG forms a right triangle
EF is the hypotenuse, EG is the opposite, so we need to use Sin ratio.
Sin F = 11/15
Sin^-1(11/15) = Angle F
Angle F = 47 degrees
Letter C