Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. W 137 cos 15 137 - sin sin - Find its exact value.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 13E
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Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number.
137
co( cos(-) - sin() sin(-)
13л
Find its exact value.
Transcribed Image Text:Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. 137 co( cos(-) - sin() sin(-) 13л Find its exact value.
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