Use the following three identities to evaluate S sin sx cos tx = sin sx sin tx = cos sx cos tx = ·S= sin 26x cos 17x dx. 1 [sin (s+t)x+ sin (s-t)x] 12/20 [cos (s+t)x cos (s-t)x] sin 26x cos 17x dx = 1 21 [cos (s+t)x+ cos (s - t)x]
Use the following three identities to evaluate S sin sx cos tx = sin sx sin tx = cos sx cos tx = ·S= sin 26x cos 17x dx. 1 [sin (s+t)x+ sin (s-t)x] 12/20 [cos (s+t)x cos (s-t)x] sin 26x cos 17x dx = 1 21 [cos (s+t)x+ cos (s - t)x]
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 54E
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