The unit circle is a core concept in trigonometry. Think of it as a visual reference for understanding trig functions and how they relate to angles. The unit circle is simply a circle with a radius of 1, centered on a standard x-y coordinate plane.
In this guide, we’ll break down the different parts of a blank unit circle and how to use it to perform trig calculations.
We’ll cover angles, radians, trig functions, and how to fill out the unit circle yourself.