# Chapter 4: Trigonometric Functions

## Section Quiz 4.8

1. Find A in right triangle ABC, where C is the right angle, given . [Hint]

2. A building is approximately 450 ft tall. The angle of depression from a point on the top of the building to a spectator on the ground is . How far, to the nearest foot, is the spectator from the base of the building? [Hint]

3. A ball on a string is pulled 5 inches below its rest position and then released. The period of the motion is 8 seconds. Write the equation for the ball’s simple harmonic motion. [Hint]

4. An object moves in simple harmonic motion described by , where t is measured in seconds and d in centimeters. Find the time required for one cycle. [Hint]

5. You leave your house and walk 3 miles due east and then 2.2 miles due south. At that time what is your bearing from your house? [Hint]

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