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Home > PC3 > Chapter 13 > Lesson 13.1.4 > Problem 13-52


Josh is taking a leisurely ride on his bike. At seconds the pedal on his bike is closest to the ground at height of inches. The pedal reaches its highest point of inches seconds later. Write an equation to model the height of the pedal over time. Determine all the times that the pedal is exactly ft off the ground in the first seconds of Josh’s ride.

Draw a sketch of the situation. From the sketch, determine the:
1. amplitude
2. vertical shift
3. horizontal shift (use a negative cosine function)
4. period and