Basic Identities Trigonometric Identities Section 3.1 Copyright © 2011 Pearson Education, Inc.

Reciprocal Identities The following equations are identities: Copyright © 2011 Pearson Education, Inc.

Tangent and Cotangent in Terms of Sine and Cosine The following equations are identities: Copyright © 2011 Pearson Education, Inc.

Pythagorean Identities The following equations are identities: Copyright © 2011 Pearson Education, Inc.

Odd and Even Identities Figure 3.4 Copyright © 2011 Pearson Education, Inc.