86. (a) 2 sin 74º sin 24° (b) 8 sin 18x cos 13x
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 23E
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explanation on question 86 please
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