Who needs a plan — let trigonometry protect you! Pupils determine the angle of an approaching enemy to a village wall. The scholars determine the exact value of trigonometric functions for the angle. Class members use trigonometry to prove whether a triangle exists with a zero-degree angle.

Concepts

angle of rotation, trigonometric, trigonometric functions, angles, special right triangles, unit circle, tangent, cosine, sine

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Additional Tags

math

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Instructional Ideas

• Spend some time reviewing radian measures

Classroom Considerations

• The class should know the exact trigonometric values for the special angles 30, 45, 60, and 90
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Pros

• Displays the correct answer if the incorrect answer is chosen
• The reference contains a unit circle with coordinates for common angles

Cons

• None

Common Core

HSF-TF.A.2 HSF-TF.A.4