Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.5: Product-to-sum And Sum-to-product Formulas
Problem 2E
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Question
Use as shown to prove the Law of Cosines (which is a generalization of the Pythagorean theorem): c2 = a2 + b2 - 2ab cos u.
![VA
(b cos 0, b sin 0)
b
a
(a, 0)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5488482f-f57b-404c-8eb3-18d0773eaf44%2F9a814bbe-03da-4b49-9da8-2d01537da00c%2Ftba5jhx.png&w=3840&q=75)
Transcribed Image Text:VA
(b cos 0, b sin 0)
b
a
(a, 0)
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