Then we looked at how to find the amplitude: |a|, frequency (b), and the period for a given cosine graph. Then we used those features to create the graph. The cosine graph starts at the "a" value (as long as there is no vertical shift).
Use the links below for reivew or practice
https://www.youtube.com/watch?v=BwS99qnEkqY
https://www.youtube.com/watch?v=vnGE716t9Yk
https://www.youtube.com/watch?v=YVQbGZ9KfFM up to the 5 minute mark
HW: Complete the 13.5 packet except for the solving equations (11 - 16).