Trigonometric Identities
Trigonometric Identities
Trigonometric Identities
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Copyright © 2009 Pearson Addison-Wesley<br />
Product-to-Sum <strong>Identities</strong><br />
The identities for cos(A + B) and cos(A – B) can be<br />
added to derive a product-to-sum identity for<br />
cosines.<br />
5.5-19