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Chapter 9 Some Applications of Trigonometry, , . The of an object is the angle formed by the line of sight with the horizontal, when the object is above the horizontal level. (1), , angle of projection, angle of depression, angle of elevation, , Bor p, , none of these, , . From a point on the ground which is 15m away from the foot of a tower, the angle of, elevation is found to be 60°. The height of the tower is (1), , a 15/3 m, b. 20/3 m, c. 10/3 m, d. 10m, , . From a point P on the level ground, the angle of elevation of the top of a tower is 30°., If the tower is 100m high, the distance between P and the foot of the tower is (1), , a. 3003 m, b. 1503 m, c. 2003 m, d. 1003 m, , . An electric pole is 10,/3 m high and its shadow is 10 m in length, then the angle of, elevation of the sun is (1), , a. 45°, b, 15°, c. 30°, ad. 60°, , . If the shadow of a boy ‘x’ metres high is 1.6m and the angle of elevation of the sun is, , 45°, then the value of ‘x’ is (1), , a. 0.8m, b. 1.6m, c 3.2m, d. 2m, , . The angle of depression of car parked on the road from the the top of a 150 m, hightower is 30°. Find the distance of the car from the tower. (1), , . Ifcos A = 3 , find the value of 4 + 4tan2A. (1), Cc