Section+5.1

Section 5.1 Trigonometric Functions: The Unit Circle Approach I. Trigonometric Functions and the Unit Circle II. Circular Functions Definition: Trigonometric Functions Sin(theta) = y Cos(theta) = x Tan(theta) = y/x Cos(theta) = y Sec(theta) = 1/x Cot(theta) = x/y III. Domains and Ranges of the Circular Functions