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Double Angle Identities

Videos, worksheets, games and acivities to help PreCalculus students learn about the double angle identities.

 

 

How to Understand Double Angle Identities Based on the sum formulas for trig functions, double angle formulas occur when alpha and beta are the same. Take a look at how to simplify and solve different double-angle problems that might occur on your test.

 

 

Confirming a Double-Angle Identity

 

 

Using Double-Angle Identities

 

 

 

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