# 3: Trigonometric Identities

- Page ID
- 807

- 3.3: Sum and Difference Identities
- 3.3.1: Sum and Difference Formulas
- 3.3.2: Simplifying Trigonometric Expressions using Sum and Difference Formulas
- 3.3.3: Sine Sum and Difference Formulas
- 3.3.4: Cosine Sum and Difference Formulas
- 3.3.5: Tangent Sum and Difference Formulas
- 3.3.6: Solving Trigonometric Equations using Sum and Difference Formulas