### Home > PC > Chapter 2 > Lesson 2.3.4 > Problem 2-117

2-117.

Find the 3rd angle. Should you use the Law of Sines or Cosines to solve for *x*?

Law of Sines would be easiest.

Should you use the Law of Sines or the Law of Cosines to find *x*? Why?

Use the Law of Cosines, because the Law of Sines needs an angle and a value of an opposite side.