Then we looked at a real-world problem that can be modeled with a cosine function, the high and low tides. We created a graph of the situation and an equation to match it.
https://www.youtube.com/watch?v=9xnnY8q7k6g
https://www.youtube.com/watch?v=jfQ5KNt2pmc
HW: Complete WS 6 graphs. Bring your book to return on Monday, 5/21.