Answer: Use identities to write each expression in terms of sin u and cos u, and then
Chapter 5, Problem 7(choose chapter or problem)
Use identities to write each expression in terms of sin u and cos u, and then simplify so that no quotients appear and all functions are of u only. sec2 u - tan2 u
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