Lesson 9: Using Trigonometry to Find Missing Angles
Launch
Module 1 Part 2: Trigonometry
This section checks to see if you have the prerequisite knowledge and skills to be able to complete this lesson successfully.
Are You Ready?
Complete these questions in your course folder (binder). If you are experiencing difficulty, you may want to use the information and the multimedia in the Refresher section to clarify concepts before completing these exercises.
1. Find the length of the missing side or hypotenuse. Round answers to the nearest tenth.a. 
b. 
c. 
2. Given the triangle ABC, where <A = 90o and <B = 66o and c = 2.6 m, find the length of side b to the nearest tenth.
Once you have completed these exercises to the best of your ability, use the provided answer link to check your work.
If you feel comfortable with the concepts covered in the questions, move forward to Discover.
Refresher
The multimedia piece titled “How do you Find a Missing Side using Cosine” shows you how to use cosine to find a missing side.
The multimedia piece titled “How do you Find a Missing Side using Tangent” shows you how to use cosine to find a missing side.
