Trigonometric Identities
Trigonometric Identities
Trigonometric Identities
SHOW LESS
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Difference Identity for Cosine<br />
Since the central angles<br />
SOQ and POR are<br />
equal, PR = SQ.<br />
Using the distance formula,<br />
we have<br />
Copyright © 2009 Pearson Addison-Wesley<br />
5.2-5