Unit Circle

unit circle  What is the unit circle? Why is it important for trigonometry? Check our unit circle chart for values and learn how to remember them  Since the circumference of the unit circle is , 2 π , each of the points is 1 24 ⋅ 2 π = π 12 units apart Thus, the first point

We will use these coordinates in later sections to find trigonometric functions of special angles on the unit circle x 1 1 45o 2 2  Illustration of a unit circle superimposed on the coordinate plane with the x- and y-axes indicated

The unit circle is used as a way to help you evaluate the sin and cos at frequently used angles It accounts for both degree and radian measure  See description below In mathematics, a unit circle is a circle with a radius of one In trigonometry, the unit circle is the circle of