Applications of Trigonometry Heights and Distances Chapter 9 Exercise 9.1 Question 7
7. From a point on the ground, the angles of elevation of the bottom and the top of a transmission tower fixed at the top of a 20 m high building are 45
and 60
respectively. Find the height of the tower.
Solution:
It is given that tower (AD) is fixed at the top of 20 m high building (DC).
In
, we have
m
In
, we have
m
Length of tower (AD) = AC – DC =
m
Leave a Reply