Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN: 9780134217437
Author: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher: PEARSON
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Question
Explain how the cosine and sine functions are defined. Think about the unit circle and right
triangles. For example, when we ask for the value of cos(), which definition are we using?
Why?
Suppose that 0 € ;, 1] and that sin 0 = . What is the value of cos 0 ?
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Transcribed Image Text:Explain how the cosine and sine functions are defined. Think about the unit circle and right triangles. For example, when we ask for the value of cos(), which definition are we using? Why? Suppose that 0 € ;, 1] and that sin 0 = . What is the value of cos 0 ?
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