The "CONE" of your scent is going to be determined by many factors, including the wind speed, habitat, time of day, and most importantly, the terrain. Hilly terrain has a major impact on wind patterns, as the terrain deflects the wind and causes large-scale vertical and horizontal eddies.

The properties of moving air (wind) are basically the same as moving water. Water flowing down a stream is deflected by objects it encounters and friction with the stream bank. The same is true of air flowing over the ground. Not only does the ground and trees produce friction than can produce vertical eddies, hills and valleys can "turn" the wind and produce extremely large eddies (hundreds of feet thick vertically and horizontally).

And that doesn't even begin to touch on the subject of thermals--air currents driven by differences in air temperature. In hilly terrain, thermals can overpower light winds by a considerable margin, with warmer air rising up hillsides and cooler air sinking and running down valleys like water.

Normally, in flat terrain, open habitat, and a steady moderate breeze, you can expect a 90 degree scent cone (45 degrees left and right of directly downwind). However, add in the turbulent effect of air traveling through a forest, and in wooded terrain, expect your scent cone to expand to at least 180 degrees (90 degrees either side of directly downwind). The combination of terrain and thermals in hilly wooded terrain can produce a 360 degree scent cone over a 3-4 hour treestand sit.