Trigonometry

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1 / 11: Introduction to Trigonometry: Angles and Radians

2 / 11: Trigonometric Functions: Sine, Cosine, Tangent, Cosecant, Secant, and Cotangent

3 / 11: The Easiest Way to Memorize the Trigonometric Unit Circle

4 / 11: Basic Trigonometric Identities: Pythagorean Identities and Cofunction Identities

5 / 11: Graphing Trigonometric Functions

6 / 11: Inverse Trigonometric Functions

7 / 11: Verifying Trigonometric Identities

8 / 11: Formulas for Trigonometric Functions: Sum/Difference, Double/Half-Angle, Prod-to-Sum/Sum-to-Prod

9 / 11: Solving Trigonometric Equations

10 / 11: The Law of Sines

11 / 11: The Law of Cosines