Lesson 7

Complete the Lesson 7 Assignment that you saved in your course folder at the beginning of the lesson. Show work to support your answers.

Save your responses in your course folder.

Project Connection

You are now ready to complete the rest of the Module 4 Project. Go to Module 4 Project: The Ferris Wheel, and complete Part 2.

Save your work in your course folder. When you are finished, submit the entire project to your teacher.

Going Beyond

It is always possible to give the equation in the form or for a sine or cosine function without using negative a or b.

1. Graph the functions y = 3 sin x and y = −3 sin x.
   
   How did you account for the negative sign?
   
   Rewrite the function y = −3 sin x so the function doesn’t have a negative a coefficient.
2. Graph the functions y = cos(2x) and y = cos(−2x).
   
   How did you account for the negative sign?
   
   Rewrite the function y = cos(−2x) so the function doesn’t have a negative b coefficient.
3. When might it be an advantage to use a negative value for a or b?