Lesson: The Cosine Rule | Nagwa Lesson: The Cosine Rule | Nagwa

Lesson: The Cosine Rule Physics

In this lesson, we will learn how to use the cosine rule to find missing sides and angles in different triangles.

Lesson Plan

Students will be able to

  • use 𝑎=𝑏+𝑐−2𝑏𝑐(𝐴)cos to find a missing side or angle of a triangle,
  • use 𝑎=𝑏+𝑐−2𝑏𝑐(𝐴)cos in conjunction with other angle facts to find a missing side or angle of a triangle.

Lesson Video

Video Thumbnail
13:34

Lesson Playlist

  • Using the Cosine Rule to Find the Angles of a Triangle
    02:58
  • Using the Cosine Rule to Find the Side Lengths of a Triangle
    02:29
  • Using the Cosine Rule to Find the Side Lengths of an Isosceles Triangle
    02:24

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