PROOF =- - bc (1 – cos A) = - Use the Law of Cosines to prove that a-b+c a+b-c 2 2
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 59E
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It should be a -c at the end for the start of the equation.
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