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Power Reducing Identities





 
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More Lessons for PreCalculus

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Videos, worksheets, games and activities to help PreCalculus students learn about the power reducing identities and how to use them.

Using a Power-Reducing Identity

Power Reducing Formulas for Sine and Cosine, Example 1.
This video gives the reducing formulas for sin2x and cos2x in terms of cos x and how to use the reducing formulas.
Power Reducing Formulas for Sine and Cosine, Example 2.
This video gives the reducing formulas for sin2x and cos2x in terms of cos x and uses them to solve for csc4 (2x) = 4



Here we apply power-reducing formulas to "simplify" sin to the fourth power


 
Power Reducing Formulas


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