This Lesson (VIDEO: The Law of Cosines Part 1) was created by by
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I am a student at Stanford University.
The law of cosines is a formula that allows us to find the third side of a triangle using the two other sides and the angle between them. It is a generalization of the Pythagorean Theorem. I solve two example problems in this video and a practical application problem in part 2 of this lesson. For more details, see the videos.
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