Defining the Unit Circle

4-02 Unit Circle unit circle 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 unit 731 A unit circle is a circle on xy x y plane, centred at origin and having radius equal to one unit Angle on a unit circle is an angle between

united kingdom Trigonometric Functions of Special Angles , can be identified on the unit circle A unit circle with x and y coordinates shown for