Unit 6, Lesson 4

The Unit Circle (Part 2)

Integrated Math 3

Practice

1. Problem 1

   Student Task Statement

   Angle measures radians, and the coordinates of are about .

   

   A circle with center B at the origin of an x y plane. Point A lies on the outside of the circle, on the x axis, to the right of the origin. Point C lies on the outside of the circle, in the first quadrant, and is closer to the y axis than the x axis. Point D lies on the outside of the circle, in the second quadrant, and is closer to the y axis than the x axis. Point E lies on the outside of the circle, in the fourth quadrant, and is closer to the y axis than the x axis.

   1. The measure of angle is radians. What are the approximate coordinates of ? Explain how you know.
   2. The measure of angle is radians. What are the approximate coordinates of ? Explain how you know.