RE: Stand heght for recurve?
It's a learned behavior, and possibly something that is also taught by parent to offspring. I know it's learned, at least to an extent, from experience. At least twice when I've hunted with friends I've been told about a deer missed from a particular stand, and have a deer come in looking straight at that stand. I imagine deer that share the woods with mountain lions have learned to look up also.
All that math went over my head--I had it in high school and as part of my training in the military, but that was a long time ago. I can understand someone wanting to know the why's and how's, but the simple solution to the problem is to practice the same situations you plan to use hunting.
Chad