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Trig: Sum Difference & Double Angle Identities 355

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About this Lesson

  • Type: Video Tutorial
  • Length: 73:37
  • 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 73 minute trigonometry lesson focuses on the four sum and difference identities: sin (A + B ), sin (A – B), cos (A + B), and cos (A - B). We'll also look at the double angle identities: sin (2A) and cos (2A).

This lesson show you how to find:
- exact value of angles using the sum and difference identities and special angles
- write the sum and difference identities as single trig expressions
- simplify expressions using the sum and difference identities
- find the formulas for the double angle identities using the sum & difference identities

This lesson contains explanations of the concepts and 20 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:
- 315 Basic Trigonometry Part II (http://www.mindbites.com/lesson/5123)
- 320 Trigonometry on the coordinate Plane (http://www.mindbites.com/lesson/5122)
- 350 Simplifying Trig Expressions & Proving Trig Identities (http://www.mindbites.com/lesson/5119)

About this Author

Teacher Sydney
Teacher Sydney
65 lessons
Joined:
07/02/2009

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.
These lessons are a convenient and easy way to get math help. Pick and choose only the lesson(s) or packages (series) that you want. There are free previews. You might look at the Transcripts for a quick review of the lesson content.

For a complete list of lessons available on MindBites (mathmadesimple.mindbites.com. To access free previews please see above or visit
MathMadeSimple.com and click on the tab
"LIST OF ALL LESSONS".

To Contact us please email mathmadesimple.com@gmail.com

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Recent Reviews

Nopic_dkb
how to obtain
04/14/2012
~ Lucas5

It's a great video, i wish to download.
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bought this one.

Nopic_dkb
how to obtain
04/14/2012
~ Lucas5

It's a great video, i wish to download.
I could download one video, that's wy I
bought this one.

This 73 minute trigonometry math help lesson covers the sum and difference identities and the double angle identities
Find exact values of angles using the sum and difference identities and special angles
Write the sum and difference identities as single trig expressions
Simplify expressions using the sum and difference identities
Find formulas for the double angle identities sin (2A)and cos (2A) using the sum and difference identities

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