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Law of Sines and Cosines

Law of Sines and Cosines

This math unit from Illuminations includes two lessons which help to teach the Law of Sines and the Law of Cosines. The first lesson asks students to use right triangle trigonometry to develop the law of sines. The second lesson uses right triangle trigonometry and the Pythagorean theorem to develop the law of cosines. The materials are intended for grades 9-12 and should require 2 class periods to complete.... Show More

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