4.1

An aeroplane at J flying directly over point D on the ground at a height of 5 kilometres. It is

heading to land

at point K, the angle of depression from J to K IS 8°. S is a point along route

from D to K

5 Km

D

8

S

4.1.1

Write down the size of JRD.

(1)

4.1.2

Calculate the distance DK, correct to the nearest metre.

(3)

4.1.3

If the distance SK is 12 kilometres, calculate the distance DS.

(2)

4.1.4

Calculate the angle of elevation from S to J, correct to ONE decimal place.

(3)

(9)