what you should learn
- Sketch the graphs of basic sine and cosine functions.
- Use amplitude and period to help sketch the graphs of sine and cosine functions.
- Sketch translations of the graphs of sine and cosine functions.
- Use sine and cosine functions to model real-life data.
Why you should learn it
Sine and cosine functions are often used in scientific calculations. For instance, in Exercise 87 on page 328, you can use a trigonometric function to model the airflow of your respiratory cycle.