Trigonometric Identities
Trigonometric Identities
Trigonometric Identities
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Copyright © 2009 Pearson Addison-Wesley<br />
Product-to-Sum <strong>Identities</strong><br />
Similarly, subtracting cos(A + B) from cos(A – B)<br />
gives a product-to-sum identity for sines.<br />
5.5-20