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Trigonometric Identities

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Example 1<br />

If and θ is in quadrant II, find each function<br />

value.<br />

(a) sec θ<br />

Copyright © 2009 Pearson Addison-Wesley 1.1-7<br />

FINDING TRIGONOMETRIC FUNCTION<br />

VALUES GIVEN ONE VALUE AND THE<br />

QUADRANT<br />

In quadrant II, sec θ is negative, so<br />

Pythagorean<br />

identity<br />

5.1-7

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