The Law of Cosines
4:38
YouTubeProfessor Dave Explains
The Law of Cosines
The law of sines helped us solve for all the sides and angles in SAA, ASA, and SSA triangles, but now we have to learn the law of cosines if we want to solve for SAS and SSS triangles. This one is kind of like the pythagorean theorem, just for oblique triangles instead of right triangles, so it has trig functions in it. Let's check it out ...
211.8K viewsFeb 5, 2018
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