Description
In the preceding lessons, students have developed the height and co-height functions of a passenger car on a Ferris wheel and considered the historical roots of trigonometry through developments in astronomy. From these experiences, we extract the meaning of the sine and cosine of a number of degrees of rotation. For consistency with their past experiences with triangle trigonometry, we need to demonstrate that our new functions of sine and cosine are generalizations of the sine and cosine functions of an angle in a triangle studied in geometry. For this lesson confine discussion to rotations by a number of degrees between 0 and 360.
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From EngageNY.org of the New York State Education Department. Algebra II Module 2, Topic A, Lesson 4.
Available from engageny.org/resource/algebra-ii-module-2-topic-a-lesson-4; accessed 2015-05-29.
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