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module 2
17 Instructional days (17 hours)

Trigonometric Functions


Math Grade 11 Curriculum Map

Description

Module 2 builds on students’ previous work with units and with functions from Algebra I, and with trigonometric ratios and circles from high school Geometry. The heart of the module is the study of precise definitions of sine and cosine (as well as tangent and the co-functions) using transformational geometry from high school Geometry.

This precision leads to a discussion of a mathematically natural unit of rotational measure, a radian, and students begin to build fluency with the values of the trigonometric functions in terms of radians. Students graph sinusoidal and other trigonometric functions, and use the graphs to help in modeling and discovering properties of trigonometric functions. The study of the properties culminates in the proof of the Pythagorean identity and other trigonometric identities.

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Credits

From EngageNY.org of the New York State Education Department. Algebra II Module 2. Available from engageny.org/resource/algebra-ii-module-2; accessed 2015-05-29.
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