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Trig: Trigonometry on the Coordinate Plane - 320


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About this Lesson

  • Type: Video Tutorial
  • Length: 73:09
  • Media: Flash video file
  • Use: Watch Online
  • Access Period: 90 Days
  • Posted: 08/04/2009

This lesson is part of the following series:

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

This 73 minute trigonometry lesson covers angles in standard position, co-terminal angles and principal angles. The six trig ratios are defined for an angle in standard position and the CAST rule is introduced. The lesson finishes with finding reference angles. This lesson will show you how to :
- draw positive and negative angles in standard position
- find positive and negative angles co-terminal with a given angle
- find the principal angle
- work with the terminal arm, positive and negative angles,
- find the six trig ratios of an angle in standard position in all four quadrants
- use and understand the CAST rule
- find reference angles
- work with quadrantal angles

This lesson contains explanations of the concepts and 15 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 (

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 73 Trigonometry math help lesson covers trigonometry on the coordinate plane
Angles in standard position
co-terminal angles
principal angles
The CAST rule to determine the sign of the trig ratio is covered
Find reference angles
Initial arm
Terminal arm
Direction of rotation
Quadrants and quadrantal angles

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