Using the Law of Cosines for Non-Right Triangles

Learn how to apply the Law of Cosines to find missing sides or angles in non-right triangles. 📐

Using the Law of Cosines for Non-Right Triangles
Mario's Math Tutoring
45.8K views • Feb 4, 2016
Using the Law of Cosines for Non-Right Triangles

About this video

How to use the Law of Cosines when you don't have a right triangle to solve for the missing side or missing angle. We discuss how to know when to use the Law of Cosines as opposed to the Law of Sines. We go through 2 examples - one where you are given 3 sides and another where you are given 2 sides and an angle.

Timestamps:
00:00 Intro
0:07 When to Use the Law of Cosines
0:29 3 Different Formulas for the Law of Cosines
1:25 Example 1 Find the Missing Side Length Given SAS
3:17 Example 2 Find the Missing Angle Given 3 Sides

Related Videos:

Law of Sines
https://youtu.be/kjKV2YjQBEY

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Video Information

Views

45.8K

Likes

436

Duration

5:44

Published

Feb 4, 2016

User Reviews

4.3
(9)
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