Simplify. cos ( + ) - cos ( - )
Question:
Simplify.
cos (α + β) - cos (α - β)
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Step by Step Answer:
We can use the sumtoproduct identity for cosine ...View the full answer
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Related Book For 
Algebra And Trigonometry Graphs And Models
ISBN: 9780134179049
6th Edition
Authors: Marvin Bittinger, Judith Beecher, David Ellenbogen, Judith Penna
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