### Home > PC > Chapter 7 > Lesson 7.1.2 > Problem 7-28

7-28.

Find:

1. Amplitude

2. Vertical Shift

3. Horizontal Shift

4. *b* (frequency)

Note: part (a) is the period and *pb* = 2*π*

Test your answer in your graphing calculator.

Find where the function crosses *y* = 30.

Note: The first two times may have occurred before the curve in the given sketch.