Use the law of cosines to show that, if a2 b2 c2 , then A
Chapter , Problem 28(choose chapter or problem)
Use the law of cosines to show that, if a2 b2 c2 , then A 90.
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