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

2-117.

Find the value of for each triangle.

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

?Law of Sines would be easiest.

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

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