Answer:
Below
Step-by-step explanation:
This question appears to have the man at some height greater than the base of the building.....
500 is one leg of a right triangle
10 000 - m is the other leg (where m = man's height above ground level)
tan(85) = (10 000 - m) / 500
finds m = 4284.97
so the building height ABOVE the man's height is
10 000 - 4284.97 = 5715.026
This would be the second leg of the right triangle
using pythag theorem
500^2 + 5715.026^2 = L ^2 L = line of sight distance
L = 5736.9 M
Here is a shorter way:
tan 85 = opp / 500 shows opposite side leg = 5715.026
then pythag theorem shows L = 5736.9 as calculated above