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: 08/04/2009
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
 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.
To Contact us please email mathmadesimple.com@gmail.com
Recent Reviews
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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