Applications of Trigonometry Heights and Distances Chapter 9 Exercise 9.1 Question 12
12. From the top of a 7 m building, the angle of elevation of the top of a cable tower is and the angle of depression of its foot is . Determine the height of the tower.
It is given that height of building (BC) = 7 m
We want to find height of tower AD.
We have CD = BE, Therefore, BE=7 m
Height of Tower (AD) = AE + DE = m