Learning Resources
Lesson
What comes to mind when you hear the term "radian measure?" If you feel you have a solid understanding of this concept, its meaning and how to work with it, you may, with permission from your on-line teacher, skip over the Investigation and go directly to the Check Your Understanding questions on pages 215 - 217.
If however, you are unsure of the concept, you will need to proceed through the Investigation. After its completion, you should have a clear understanding of radian measure and the connection between it, angle measure, and the length of an arc on a circle.
The following materials are required for this Investigation:
- graph paper
- compass
- protractor
Carry out the procedureas outlined on page 214 of your text and complete the related Investigation Questions. A few hints are provided for some of the steps. Use them if you are experiencing difficulty before contacting your on-line teacher.
Notebook Entry:Record your understanding of radian measure. After completing this task, you may check to ensure you have included all necessary details in your response. Also record the definition of a terminal arm as given in the margin on page 217.
The following may be helpful when you attempt the Check Your Understanding questions.
Activity
C.Y.U. pages 215 -217 #'s 6 - 19
When you have completed these questions, ask your on-site teacher to get the solutions for you from the Teacher's Resource Binder and check them against your answers. After you do this, if there is something you had trouble with and still do not understand, contact your on-line teacher for help.
Test Yourself
- Give the exact value of cos
. - Calculate the exact value of (sin 45°)(sin 270°) + cos 300°.
- Find all possible solutions, in radians, for sinx =
.
Solutions
