Can i get help with this cosmology questions Problem 1. Suppose you are a two-dimensional being, living on a sphere of radius R.1. Show that if you draw a circle of radius r, the circle's circumference will beC = 2nRsin(r/R)2. Idealize the Earth as a perfect sphere of radius R = 6371 km. If you could measure distances with anerror of ±1 meter, how large a circle would you have to draw on the Earth's surface to convince yourselfthat the Earth is spherical rather than flat ?

(1) The angle of a circle goes from 0 to 2π For the circumference of the circle, integrate the arc…

Answered: that if you draw a circle of radius r,…

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