Use the sum-to-product identities to rewrite the following expression as a product. cos(140°)−cos(75°)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 37E
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Use the sum-to-product identities to rewrite the following expression as a product.

cos(140°)−cos(75°)

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