# A Few Final Words

Although we’ve covered quite a bit of material in a few pages, this is hardly everything there is to know about trigonometry.

Here are some topics for further exploration. Ask your math teacher to point you to material to help you investigate them.

- What are “radians”?
- If you add sin(A) + sin(B), is that the same as sin(A+B)?
- How is the sine function related to the electricity in your home?
- How is the sine function related to music?
- How is the sine function related to light?

You can find out more about trigonometry by looking at the resources available from Ask Dr. Math.

Other tutorials are available on the web.

Thanks for looking at these pages. If you have any comments, questions, or opinions (or fan mail), please let me know.