A little story to help remember the sin and cos angle addition formulas.

1. Sinbad & Cosette A trigonometric love story

2. Once upon a time. . .

3. There were two families… the Tanu the Tanv family family

4. The families were great friends and enjoyed spending time together as their children grew up.

5. Once Sinbad and Cosette got to high school, things changed. Sinbad, after spending so much time with Cosette as a child, fell in love with her.

6. Unfortunately, Cosette didn’t feel the same way.

11. To summarize: When Sinbad drives: sin(u + v) = When Cosette drives: cos (u + v) = When the families get together: tan (u + v) =

12. The Moral of the Story: Some of the people to whom we are attracted are not attracted to us. It is not unusual for a person who has shown interest in us to later lose interest in us. Maybe that is a good thing, because it forces us to date a lot of people and to become more experienced in maintaining relationships.

13. The 2 nd Moral of the Story: Trigonometry is everywhere!