Derive the Law of Cosines assuming the angle is obtuse, as
Chapter , Problem 8.2.40(choose chapter or problem)
Derive the Law of Cosines assuming the angle is obtuse, as in Figure 8.38. Figure 8.38
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer