Answer:
About 3.36 feet or about 40.3 inches
Explanation:
The tangent ratio tells you ...
Tan = Opposite/Adjacent
In this geometry, we want ...
tan(50°) = (4 ft)/(distance)
Solving for distance gives ...
distance = (4 ft)/tan(50°) ≈ 3.3564 ft ≈ 40.28 in
The steps need to start about 3.36 feet, or about 40.3 inches, out from the house.