To find the angle of elevation, we can use trigonometry. The angle of elevation (θ) can be calculated using the tangent function:
tan(θ) = opposite / adjacent
In this case, the opposite side is the vertical distance (3000 feet) and the adjacent side is the horizontal distance (4000 feet). So,
tan(θ) = 3000 / 4000
Now, we can find the angle θ by taking the arctan (inverse tangent) of this ratio:
θ = arctan(3000 / 4000)
Using a calculator, we find:
θ ≈ 36.87 degrees
So, the angle of elevation from point A to the plane is approximately 36.87 degrees.