Discovering Trigonometric Ratios

Students investigate and discover trigonometric ratios by drawing and measuring side lengths for five triangles that have equivalent angle measure. Students collect, analyze, and discuss data to draw conclusions. This is the introductory lesson to facilitate student discovery of trigonometric ratios and allows students to secure a solid foundation before the use of trigonometry to find missing sides. This lesson has students solving application problems by finding an unknown angle based on length measurements.
Resource ID#: 46546 Type: Lesson Plan
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General Information

Subject(s): Mathematics
Grade Level(s): 9
Intended Audience: Educators educators
Suggested Technology: Graphing Calculators
Instructional Time: 2 Hour(s)
Keywords: trigonometry, trigonometric ratio, sine, sin, cosine, cos, tangent, tan, triangles, arcsine, arccosin, arctan, arctangent, inverse trig
Instructional Component Type(s): Lesson Plan,  Worksheet,  Formative Assessment
Resource Collection: CPALMS Lesson Plan Development Initiative

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