To describe: Two situations where the Law of Cosines is needed to solve a triangle.
Explanation of Solution
Given information: The Law of Cosines
Calculation:
Law of Cosines is used when either you have three sides of oblique triangles and no angles or you have two sides and at least the angle corresponding to the missing side length.
You may be given some information where you have to solve for the angle.
In other words, use Law of Cosines if your triangle looks like the one below.
Or like this one.
Chapter 5 Solutions
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
Additional Math Textbook Solutions
Calculus: Early Transcendentals (2nd Edition)
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Calculus: Early Transcendentals (3rd Edition)
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