How to use law of cosines to find the missing angles of a triangle given SSS

The video tutorial explains how to find missing angles in a triangle when only side lengths are given. It begins by discussing why the law of sines cannot be used due to the lack of angle information and introduces the law of cosines as a solution. The tutorial provides a detailed walkthrough of calculating the largest angle first using the law of cosines, followed by using the law of sines to find the remaining angles. The importance of identifying the largest angle first is emphasized to ensure the other angles are acute, simplifying the process.

What is the law of sines and how is it applied in finding the angles of a triangle?

Explain why the law of cosines is used when the angles of a triangle are not known.

How do you determine which angle to solve for first when given three side lengths?

What is the significance of finding the largest angle in a triangle?

Describe the process of using the law of cosines to find an angle in a triangle.

How do you apply the inverse sine function in finding angles of a triangle?

What steps are involved in using the triangle angle sum theorem to find the third angle?