The rear tires of a motorhome will track inside the path of the front tires when turning. How much so depends on how sharp the turn is, and the RV's wheelbase. We have a windy road leading to our house, and the rear tires of our previous 28 foot MH would always be inside the lane markers on the sharper corners, however it's impossible to keep the rear tires of our current 43 foot MH inside the lines on those corners. I have to wait for oncoming traffic to pass, then pull into the opposite lane slightly to make the turn.
Both of our towed vehicles pretty much follow directly behind the MH while turning. That's because the distance between the MH's rear wheels and the towed vehicle's front wheels isn't very much, and our towed vehicles are narrower than the MH.
Tail swing was a bigger problem with our 32 foot gas MH than with either our 28 footer or our 43 foot DP. That's because the 32 footer's overhang was longer. That, combined with its shorter wheelbase, caused a greater tail swing - especially when turning sharply. That fact enabled me take out a truck driver's mirror one day at a double left turn lane (Unfortunately, I was on the inside lane.) Basically, if the rear of the MH can make the turn without without hitting something, the towed vehicle will also clear the turn.
I understand what you're asking about regarding the math of your questions, but every different wheelbase, overhang length and turn circumference will change the answer, somewhat. In my opinion, the best practical method of learning about your particular MH's turning characteristics is to go to a parking lot with a tape measure and somes cones, and measure exactly how far the rear end of your MH swings while turning as sharply as you can.