Use the scalar product to prove the law o f cosines for
Chapter 7, Problem 7.28(choose chapter or problem)
Use the scalar product to prove the law o f cosines for atriangle:c2 = a2 + b2 - lab cos 0,where a, b, and c are the lengths of the sides of a triangleand 0 is the angle opposite side c.
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