Answer:
39.9869 (they would probably round it to 40)
Step-by-step explanation:
Tangent is the main ratio that is used to determine the angle of depression. It may be found by using this equation tan y is equal to opposite divided by the adjacent side. The opposite side, in this case 52m, is the height of the cliff. At the angle of depression, the observer's line of sight would be above the horizontal. In simple, If you are viewing at an object below the horizon then the angle between the horizontal and your line of sight is the angle of depression.
