Solving Oblique Triangles with the Law of Cosines

This video tutorial teaches how to solve non-right triangles using the law of cosines. It begins with an introduction to the law of cosines and a review of other triangle-solving methods like the Pythagorean theorem and the law of sines. The video explains the law of cosines formula and its notation, followed by two cases: finding an angle when all sides are known and finding a side when two sides and an included angle are given. The tutorial concludes with a caution to use the correct trigonometric law for different cases.

Explain how to find the missing side length when two sides and their included angle are given.

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What is the approximate length of side MN?

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