Description
Students define sine, cosine, and tangent of 𝜃, where 𝜃 is the angle measure of an acute angle of a right triangle. Students denote sine, cosine, and tangent as sin, cos, and tan, respectively.
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From EngageNY.org of the New York State Education Department. Geometry Module 2, Topic E, Lesson 26.
Available from engageny.org/resource/geometry-module-2-topic-e-lesson-26; accessed 2015-05-29.
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