Question 1 Example 4.20. The angle of elevation of the top of a broadcasting tower is 50° from the point A and 60° from the point B. It is given that

the points are 120 metres apart and that A is due north of the tower, and B is due east of the tower. Let O be the base of the tower. a) Draw a diagram to illustrate this information. b) By letting the height of the tower beh, show that: i) OA = h cot 50° ii) OB = h cot 60° c) Hence find the height of the broadcasting tower correct to two decimal places.