Demonstrate the calculator keystrokes necessary for finding a measure of an angle using trigonometry. A straight forward lesson explains how to calculate an angle measure given a sine, cosine, or tangent ratio. The narrator discusses rounding as well.

Concepts

trigonometric ratios, sine, cosine, tangent, angles

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Additional Tags

math

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Instructional Ideas

• Post the video as a resource for absent pupils
• Pause the video to allow pupils to make calculations before the instructor shows the correct answer

Classroom Considerations

• Builds on an understanding of sine, cosine, and tangent ratios

• This video is hosted on YouTube

Pros

• Disable YouTube comments to ensure there is nothing inappropriate
• Explanations apply to different variations of calculators

Cons

• None

Common Core

SL.9-10.2 HSG-SRT.C.8 RST.9-10.7