Using the law of cosines for a triangle with SAS

The video tutorial explains how to solve a triangle using the law of cosines and the law of sines. Initially, the law of cosines is applied to find the length of side A. Then, the law of sines is used to determine the angles of the triangle, specifically focusing on angle C. The tutorial also discusses the verification of possible cases for angle C and concludes with calculating angle B using the angle sum theorem.

Describe how to use the law of cosines to find the length of side A.

What is the significance of the cosine of 30 degrees in the calculations?

What conclusion can be drawn about the obtuse angle in this triangle?