9.1,15,16

Some Applications Of Trigonometry : Some Applications Of Trigonometry CHAPTER - 9 EXERCISE - 9.1

QUESTION 15 :-A straight highway leads to the foot of a tower. A man standing at the top of the tower observe a car at an angle of depression of 30o, which is approaching the foot of the tower with a uniform speed. Six seconds later, the angle of depression of the car is found to be 60o. Find the time taken by the car to reach the foot of the tower from this point. : QUESTION 15 :- A straight highway leads to the foot of a tower. A man standing at the top of the tower observe a car at an angle of depression of 30o, which is approaching the foot of the tower with a uniform speed. Six seconds later, the angle of depression of the car is found to be 60o. Find the time taken by the car to reach the foot of the tower from this point.

QUESTION 16:-The angle of elevation of the top of a tower from two point at a distance of 4m and 9m from the base of the tower and in the same straight line with it are complementary. Prove that the height of the tower is 6m. : QUESTION 16:- The angle of elevation of the top of a tower from two point at a distance of 4m and 9m from the base of the tower and in the same straight line with it are complementary. Prove that the height of the tower is 6m.

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