Here is a site that clearly and thoroughly explains the unit circle and all six trigonometric functions of all quadrantal angles. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to students who have been absent or who need additional instruction on this or many other topics.

Concepts

unit circle

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Additional Tags

quadrantal angles, six trig functions, trigonometry: analytic trigonometry the unit circle, trigonometry

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Classroom Considerations

• Knovation Readability Score: 2 (1 low difficulty, 5 high difficulty)
• The intended use for this resource is Practice

Common Core

HSF-TF.A.2 HSF-TF.A.3 HSG-C.A.4 HSF-TF.B.6