Chapter 4: Trigonometric Functions

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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