Trigonometric Identities:

Lesson 3.1 - How to Graph Trigonometric Functions

Lesson 3.1 - Full 1 Hour 25 Minute Video

Lesson 3.2 - How to Graph Trig Functions - More Examples!

Lesson 3.3 - Trig Identities

Lesson 3.4 - Verifying Trigonometric Identities

Lesson 3.4 - Full 1 Hour 42 Minute Video 

Lesson 3.5 - Sum and Difference Identities

Lesson 3.6 - Double Angle Identities

Lesson 3.7 - Verifying Trig Identities with Double Angle Formulas

Lesson 3.8 - Power Reducing Formulas

Lesson 3.9 - Half Angle Identities

Lesson 3.10 - Verifying Trig Identities Using Half Angle Formulas

Lesson 3.11 - Inverse Trig Functions with Double Angle and Half Angle Identities

Lesson 3.12 - Right Triangle Trigonometry with Half Angle Identities

Lesson 3.13 - Product to Sum and Sum to Product Formulas

Lesson 3.14 - Solving Trigonometric Equations by Finding All Solutions

​Lesson 3.15 - Solving Trigonometric Equations with Multiple Angles

Lesson 3.16 - Solving Trigonometric Equations Using Double Angle Identities

Free Formula Sheet - Trigonometry

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