Let's keep trigonometry simple. When given a cosine ratio, learners must use the clues about the quadrant to determine the sine and tangent ratios. The answer key has a complete worked-out solution to help guide pupils through the problem. 

Concepts

trigonometric ratios, trigonometric identities, trigonometric, trigonometric functions

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Additional Tags

math

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Instructional Ideas

• Although the answer key uses the identities to solve, learners can still use right triangle trigonometry for the answer

Classroom Considerations

• Answer key solves by using the trigonometric identities

Pros

• The problem is simple and quick

Cons

• None

Common Core

HSF-TF.C.8