Given that:
- The glider pilot sights the landing area at an altitude of 1050 feet above the ground.
- The landing area is 6000 feet from a point directly below the plane.
Since have to find the glide angle (angle of depression), you need to draw the following Right Triangle using the data provided in the exercise:
Where the glide angle (angle of depression) is θ.
In order to find its measure, you need to use the following Inverse Trigonometric Function:

In this case:

Substituting values into the formula and evaluating, you get:

Hence, the answer is: Option 2.