Chapter 2Videos

Section 2.1

  • Lesson: Right-Triangle Based Definitions of Trigonometric Functions and Cofunctions

  • Lesson: How Trig Values Change with Angle Change and Special or Common Angles

Section 2.2

  • Lesson: Reference Angles and Non-Acute Angles

  • Examples: Using Reference Angles to Evaluate Trig Functions and Expressions

  • Examples: Finding Values of Theta using Reference Angles

Section 2.3

  • Lesson: Approximating Values of Trig Functions

  • Examples: Finding Values of Theta with a Calculator within a Given Interval

Section 2.4

  • Lesson: Significant Digits (Figures) and Right Triangles

  • Examples: How Many Significant Digits There Are and When to Round

  • Examples: Solving Right Triangles (with significant digits)

  • Lesson: Angles of Elevation or Depression

  • Examples: Angles of Elevation or Depression (using a pyramid)

Section 2.5

  • Lesson: Applications with Bearing

  • Examples: Another Comparison of the Methods for Bearing

  • Lesson: Distance and Height Applications

  • Example: A Tougher Example with Modeling Distances (highway problem)