Question

Please explain it.

The angle θ is the angle of depression from E to T. This is the angle Al-Biruni measured as 0°34. (This is where you can see the picture is not to scale, as it would be a tiny angle.) The purpose of Al-Biruni's measurements was to find the radius and the circumference of the Earth Problem 1. Use the given information to: (a) Find the radius of the Earth in cubits. Round your final answer so that it has only 2 significant digits. (This part of the problem is worth the most points. It is the most important part. This part will be graded with the rubric on the next page. In this problem, you should use the methods that we have learned in this class to come up with a way to determine the radius of the Earth given the information given. You must show all your work and explain it. Here is a starting point: Angle θ is the complement of angle TEL)

Answer 1

Given that, the angle theta is the angle of depression from E to 7 apply sines law, R/sin (90 - theta) = R + h/sin (90) degree = 7E/sin (theta) R/cos (theta) = R + h 1 + h/R = i/cos theta h/R = 1 - cos theta/cos theta R = h cos (theta)/1 - cos (theta) \r\n given that theta = 0.34^1 h = 652 cubits [because whose height is E = 652] the radius of the earth in cubits R = 652 times cos (0. 34)/1 - cos (0 - 34) therefore R = 13330609.84 cubits