Nine GeoGebra applets that help students explore how symmetries about the x-axis, y-axis, and origin on the unit circle are useful in trigonometry. Examples using the sine and cosine functions are included.

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# Tag: Reference Angles

## Unit Circle Symmetry: a GeoGebraBook Exploration

Understanding math topics without memorization

Nine GeoGebra applets that help students explore how symmetries about the x-axis, y-axis, and origin on the unit circle are useful in trigonometry. Examples using the sine and cosine functions are included.