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The Law of Cosines





 
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More Lessons for Grade 9 Math

Math Worksheets

Videos, worksheets, solutions, and activities to help Grade 9 students learn how to use the law of cosines. The Cosine Law
This lesson shows how to use the Cosine Law to find both sides and angles in triangles.
Law of Cosines
Learn about Law of Cosines, a brief introduction



Law of Cosines
Demo solving an oblique triangle using the Law of Cosines
Comparing the sine law and cosine law
This video show students when they need to use the sine law and when they need to use the cosine law for finding the missing sides of non right triangles.


 

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