Derive the given equations as indicated. Equations (20.14)(20.16) are known as the product formulas. By adding Eqs.
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Derive the given equations as indicated. Equations (20.14)–(20.16) are known as the product formulas.
By adding Eqs. (20.10) and (20.12), derive the equation
Transcribed Image Text:
cos a cos 3 = [cos(a + 3) + cos(a − 3)] (20.15)
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Related Book For
Basic Technical Mathematics
ISBN: 9780137529896
12th Edition
Authors: Allyn J. Washington, Richard Evans
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