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# Unit Circle

## Determine exact values of trig ratios for common radian measures

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Trigonometric Ratios on the Unit Circle

This lesson explores how to find the exact trig values of certain angles.

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## Unit Circle: Medieval Castle Defense

Unit Circle Interactive

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## Trigonometric Ratios on the Unit Circle Quickwrite (PreRead)

To activate prior knowledge, make personal connections, reflect on key concepts, encourage critical thinking, and assess student knowledge on the topic prior to reading using a Quickwrite.

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