1. Lesson 1

1.8. Explore 4

Mathematics 30-2 Module 6

Module 6: Sinusoidal Functions

 

In Try This 3 you may have noticed that it is possible to estimate an angle measure in degrees when you are given radians by multiplying the number of radians by 60°. For example, 4 rad is about 4 × 60 = 240°.



textbook

“Example 3” on page 487 of the textbook shows a different method for estimating the size of an angle in radians when given an angle in degrees.

 

When sketching an angle in radians, it is sometimes easier to convert the angle to degrees first. Another strategy is to use a diagram such as the following one as a guide for how big to draw the angle.

 

The diagram shows the size of angles with measures 0, 1, 2, 3, 4, 5, 6, and 2π radians.

Using this diagram as a guide, the angle shown is approximately 2.7 rad.

 

Self-Check 2


textbook

Complete questions 2.a., 2.b., and 2.c. on page 489 of your textbook. Answers