Objective

Apply the law of cosine to find the side lengths and angle measures of any type of triangles.

Web Resources

http://www.mathsisfun.com/algebra/trig-cosine-law.html        Extra examples and step-by-step instructions

http://www.mathwarehouse.com/trigonometry/law-of-cosines-formula-examples.php            Visual notes and extra video lesson

http://www.regentsprep.org/Regents/math/algtrig/ATT12/lawofcosines.htm        Lesson Notes for visual leaner

http://www.regentsprep.org/Regents/math/algtrig/ATT12/lawcosinespractice.htm        Practice Problems with Solution Button

Lesson Video

Pay Attention to the Following: