More Lessons for PreCalculus

Math Worksheets

Videos, worksheets, games and activities to help PreCalculus students learn how to derive and use the half angle identities.

Using Half-Angle Identities to Solve a Trigonometric Equation

Half Angle Identities to Evaluate Trigonometric Expressions, Example 1.

This video gives some half angle identities and show how they can be used to solve some trigonometric equations.

This video gives some half angle identities and show how they can be used to solve some trigonometric equations.

This video gives some half angle identities and show how they can be used to solve some trigonometric equations.

The derivations of the half-angle identities for both sine and cosine, plus listing the tangent ones. Then a couple of examples using the identities.

How to use the power reduction formulas to derive the half-angle formulas.

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