The angle of elevation from the tripod to the top of the tree is about 66 degrees
Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.
Let Ф represent the angle of elevation. Since the tripod is at a height of 4 feet, hence:
tanФ = (31 - 4) / 12
Ф = 66 degrees
The angle of elevation from the tripod to the top of the tree is about 66 degrees
Find out more on trigonometric ratio at: https://brainly.com/question/24349828