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Trig: The Unit Circle, Degrees & Radians 335


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About this Lesson

  • Type: Video Tutorial
  • Length: 79:52
  • Media: Flash video file
  • Use: Watch Online
  • Access Period: 90 Days
  • Posted: 08/05/2009

This lesson is part of the following series:

Trigonometry (13 Lessons) (13 lessons, $33.66)

This 80 minute trigonometry lesson is a study of the Unit Circle (a circle with a radius of one unit) and its x and y coordinates. This lesson will show you how to find the exact value of the six trig ratios of:
- all quadrantal angles 0 or 2 Pi radians, Pi/2 radians, Pi radians, 3Pi/2 radians,
- angles with a reference angle of Pi/4 radians (45 degrees)
- angles with a reference angle of Pi/6 (30 degrees)
- angles with a reference angle of Pi/3 (30 degrees)

This lesson contains explanations of the concepts and 12 example questions with step by step solutions plus 5 interactive review questions with solutions.

Lessons that will help you with the fundamentals of this lesson include:
- 300 Basic Trigonometry Part I (
- 315 Basic Trigonometry Part II (
- 320 Trigonometry on the Coordinate Plane (
- 330 Arc Length Solving 1st Degree Trig Equations (Radians) (

About this Author

Teacher Sydney
Teacher Sydney
65 lessons

Teacher Sydney is a certified teacher, B.A., B. Ed. (Math Major). She prepared a math help program consisting of 65 very comprehensive, plain and "no fluff" math video lessons.
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This 80 minute trigonometry math help lesson covers the unit circle,
find exact values using quadrantal angles and special angles
Find exact values of angles using special angles (Pi/3, Pi/4, Pi/6, radians) to find exact values for the six trig ratios without the use of a calculator.

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