20 29 For positive acute angles A and B, it is known that sin A = 20 and cos B = 11. Find the value of cos(A-B) in simplest form.
20 29 For positive acute angles A and B, it is known that sin A = 20 and cos B = 11. Find the value of cos(A-B) in simplest form.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.4: Mathematical Induction
Problem 44E
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