So here i am, trying to understand a lossless transmission line that has open-circuit termination. So i start with the generic Zi, the equivalent
impedance seen by the source, then allow the load impedance (Zl) to approach infinity. As you can see, i have no idea how to do it. It's been way to long since ive done complex limits. Please see attached workings. This is a math quesiton, you obviously don't need to know electronics to answer it.
Cheers
