How to use period as an aide to evaluate for the tangent function of an angle

The video tutorial explains how to calculate the tangent of angles using the unit circle. It begins with rewriting tangent expressions and understanding the position of 4π/3 on the unit circle. The tutorial then explores the relationship between coordinate points and their reflections across axes. Finally, it demonstrates how to simplify tangent calculations using these coordinates.

What is the formula for tangent in terms of coordinates?

Describe the process of simplifying the tangent expression involving coordinates.