Answer:
The vertical drop created an angle of 90 degrees.
Therefore, you have a right triangle.
Let's name the ski run AB, and the vertical drop BC.
Angle B would be 90 degrees.
We have two measurements AB = 1200 and BC = 308 so we can find the third measurement AC by doing pythagoras:
1200^2 + 308^2 = 1239 yards
now with the sine law
1239/sin90 = 308/sin(angle of depression)
angle of depression = sin-1(308 x sin90/ 1239) = 14.4 degrees
