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Home > GC > Chapter 5 > Lesson 5.3.3 > Problem 5-89


Eugene wants to use the cosine ratio to find on this triangle. Homework Help ✎

  1. Which angle should he use to write an equation and solve for using the cosine ratio? Why?

    He'll need the adjacent side and the hypotenuse. To which angle is adjacent?

  2. Set up an equation, and solve for using cosine.