CPM Homework Banner

Home > PC3 > Chapter 4 > Lesson 4.1.2 > Problem 4-32

4-32.

Below are two of the special angles that are used in a unit circle. Identify the radian measure for the angle shown, then state the sine, cosine, and tangent of the angle. Remember, counterclockwise angles are positive and clockwise angles are negative.  

Divide each circle into an equal number of parts. Remember that half of the circle is radians.

  1. Circle with a radius in second quadrant, about a third of the way between negative x axis & positive y axis, with curved arrow on central angle from positive x axis, to radius in second quadrant, pointing clockwise.

  1. Circle with a radius in fourth quadrant, about half way between positive x axis, & negative y axis, with curved arrow on central angle from positive x axis, to radius in third quadrant, pointing counter clockwise.

© 2022 CPM Educational Program. All rights reserved.