Please help If A and B are positive acute angles and cos A 1/7' cos B = 13/14 then show that A - B = %3D 60°?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 54E
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If A and B are positive acute angles and cos A
1/7' cos B = 13/14 then show that A - B =
60°?
Transcribed Image Text:Please help If A and B are positive acute angles and cos A 1/7' cos B = 13/14 then show that A - B = 60°?
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