Trigonometry – Do Other Trigonometric Functions Than Tan, Sin, Cos and Their Derivatives Exist?

Question

I remember my physics teacher mentioning that other trigonometric functions exist apart from the Sin Cos and Tan, he mentioned a few and they did not sound familiar, nothing like Sec Csc and Cot. I would like to learn more about them, if they exist.

Answer 1

Here is the Wikipedia page on the subject, and here is an image of a unit circle from that page that answers your question quite well. Credit for this image goes to Wikipedia User:Tttrung.