Lesson 15: Using The Law Of Cosine


Lesson on understanding law of cosines, and using it in solving for parts of the oblique triangle. Using the law of cosines, missing parts of the oblique triangle can be found. Keep in mind the given or the known parts of the triangle and the formulas of the law of cosines.

0:27 Find the missing parts of a triangle given a= 8, b=6, and c=12. 
3:44 B= 75 degrees, c = 9.5, a = 6.2

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