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# Introduction to Law of Sines

## Proportion based on ratios of sides and sines of the opposite angles for non-right triangles.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Law of Sines

Prove and use the Law of Sines.
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• Video

## Law of Sines Proof

by Meera Santhanam //basic
This video proves the law of sines theorem that you can use to find missing angles and sides for triangles.
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• Study Guide

## Laws of Sines and Cosines

by Sahana Narayanan //basic
Explanation of Law of Sines and Law of Cosines.
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