Trigonometric Identities
Trigonometric Identities
Trigonometric Identities
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Example 1(c)<br />
Copyright © 2009 Pearson Addison-Wesley 1.1-12<br />
FINDING EXACT COSINE FUNCTION<br />
VALUES<br />
Find the exact value of cos 87 cos 93 – sin 87 sin 93 .<br />
5.2-12