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Subject Area
- Math: Algebra I: Simplifying Rational Expressions
Author

Texas Instruments
Level

9-12
Activity Time

60 Minutes
Device
- TI-84 Plus
- TI-84 Plus Silver Edition
- TI-84 Plus C Silver Edition
- TI-84 Plus CE
Software

TI Connect™ CE
Applications
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Trigonometric Ratios

Activity Overview

Students discover the trigonometric ratios through measuring the side lengths of similar triangles and calculating their ratios. The formal definitions of the sine, cosine, and tangent or an angle are presented and applied to find the missing side lengths.

Key Steps

Students will measure the angle of a triangle.
Students will compare triangles to see if they are similar.
Students will apply the sine, cosine, and tangent of angles to find missing side lengths.

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Activities

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Teacher Files

Student Files

Alignment

Subject Area

Author

Level

Activity Time

Device

Software

Applications

Cabri™ Jr. for TI-83 Plus and TI-84 Plus

Cabri™ Jr. for TI-84 Plus C Silver Edition

Cabri™ Jr. for TI-84 Plus CE

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Trigonometric Ratios

Activity Overview

Key Steps

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