Concept explainers
In order to find the distance |AB| across a small inlet, a point C was located as in the figure and the following measurements were recorded:
Use the Law of Cosines from Exercise 83 to find the required distance.
83. Prove the Law of Cosines: If a triangle has sides with lengths a, b, and c, and θ is the angle between the sides with lengths a and b, then
[Hint: Introduce a
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Single Variable Calculus
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