1. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. Section 7.6 Graphs of the Sine and Cosine Functions

2. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall.

12. Determine the amplitude and period of y = – 4 cos (3x)

13. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall.

21. A = 3

22. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall. A = – 2 Note that this is a reflection over the x-axis of the sine function so while the amplitude is 2, A = –2.