1. Lesson 1

1.6. Explore 2

Mathematics 30-2 Module 6

Module 6: Sinusoidal Functions

 

In Try This 2 you may have noticed that a proportion can be used to estimate the size of an angle in radians given an angle in degrees. You could use the proportion if you want exact solutions, but sometimes estimates are sufficient. For example, to estimate the size of 120° in radians, you could do the following, where r is the number of radians and d is the number of degrees:

 

 

 

Notice that no units are used when representing radians.



textbook

For other examples of converting degrees to radians, read “Example 1” and “Example 2” on pages 485 and 486 of the textbook.

 

 

 

Self-Check 1

 

Complete questions 1, 3.a., and 3.b. on page 489 of your textbook. You may find it helpful to use Printable Protractor. Answers