1. Prove that (sec (n-x))_ 2 = -sec(x )tan (x) using the facts that - d(sin x) 2 = cos(x) and (cosx) dx = -sin(x). "Prove that" requires a dx dx greater degree of detailed explanation than just solving. Be sure that the explanation is thorough and do not assume that any facts are self-evident! A diagram of the unit circle in resolving the x "issue" would be greatly appreciated (but not required)