Use the law of cosines to show that, if a = + , then A =
Chapter 7, Problem 7.1.106(choose chapter or problem)
Use the law of cosines to show that, if a = + , then A = 900
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