The Significance of the Unit Circle in Trigonometric Functions
TL;DR: The unit circle is the cheat sheet of trigonometry. It is just a circle of radius 1, drawn on a coordinate plane — but every value of sine and cosine you’ll ever need lives on it. Once you can read the unit circle, the formulas in your textbook stop looking like a code you […]
The Unit Circle
A unit circle from the name itself defines a circle of unit radius. In the following guide, you will learn more about the unit circle.