How do you solve an equation like trigonometry? Learners apply their understanding of trigonometric ratios to find unknown angles in right triangles. They learn the meaning of arcsine, arccosine, and arctangent. Problems include basic triangles and application questions. 

Concepts

trigonometric equations, trigonometric ratios, right triangles

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Additional Tags

math

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Instructional Ideas

• Include applications that do not have a picture, allowing pupils to practice reading and drawing the related triangle
• Give learners a triangle with all three sides given; ask them to calculate the measure of an angle three different ways and compare the results

Classroom Considerations

• Requires a calculator with trigonometric functions
• The last lesson before the assessment in the 36-part series

Pros

• Problems contain a good mix of those needing sine, cosine, and tangent ratios
• Includes an opening exercise, exit ticket, and practice problems

Cons

• None

Common Core

HSG-SRT.C.6 HSG-SRT.C.7 HSG-SRT.C.8