2. Find the value of the angle marked x in the diagram. Give your answer correct to the nearest degree.
P 10 S x 65° R
3. A passenger in a plane is told that he is flying at a height of 4 000 m and is 15 km from the airport.
What is the angle of depression from the plane to the airport? Give your answer to the nearest degree.
15 km 4 000 m
Q 3
4. Sophie stands 5 m from a tree. From her eye level, the angle of depression to the base of the tree is 19° and the angle of elevation to the top of the tree is 64°.
(i) Use the information to estimate Sophie’s height, giving your answer to the nearest centimetre.
(ii) How tall is the tree? Give your answer to the nearest metre.
(iii) What further information is needed to accurately calculate Sophie’s height?
5. Tim and Sara are at opposite sides outside a building that is 180 metres in height. They measure the angle of elevation to the top of the tower as 42° and 58° respectively.
Find the distance, correct to two decimal places, between Tim and Sara.
6. From a plane flying due east at 365 m above sea level, the angles of depression of two ships sailing on the sea below measure 34° and 24°.
How far apart are the ships? Give your answer to the nearest metre.