In this lesson our instructor talks about the law of cosines. She talks about the definition of law of cosines and how to use the law of cosines when both are true. She does an example of the law of cosines. Four extra example videos round up this lesson.
Law of Cosines: Let ΔABC be any triangle with a, b, and c representing the measures sides opposite angles with measures A, B, and C, respectively. Then,
Use the Law of Cosines when:
The triangle is a non-right triangle
The measures of an angle and the side opposite are not given
Law of Cosines
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.