4 1 Given that cos A = --, with A in quadrant III, and cos=-- with B in quadrant II. 5 The exact value of cos (A + B) = Blank 1 Blank 1 Add your answer
4 1 Given that cos A = --, with A in quadrant III, and cos=-- with B in quadrant II. 5 The exact value of cos (A + B) = Blank 1 Blank 1 Add your answer
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 43E
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