**Trigonometric Ratios and Functions**

13.1 Right Triangle Trigonometry

13.2 General Angles and Radian Measure

13.3 Trigonometric Functions of Any Angle

13.4 Inverse Trigonometric Functions

13.5 The Law of Sines

13.6 The Law of Cosines

13.7 Parametric Equations and Projectile Motion