Question

An airplane flying at an altitude of 1000 feet spots a runway beacon 4000 feet away.What should the airplane’s angle of descent be in order to land on the runway?

a.14°
b.18°
c.20°
d.31°

Answer 1

tan(theta) = opposite side/adjacent side
So tan (theta) = 1000/4000= 1/4
so theta= arc tan(1/4)= 0.245 radians= 0.245*180/pi = 14degree
So option a is correct.