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Consider the following accept constants:

Radius of the moon = 1.74 x 10^6 m

Average moon-earth distance = 3.84 x 10^8 m

a) What is the apparent angle the diameter of the moon subtends, as seen from the earth? Answer in units of degrees.

I doubled the radius of the moon to get the diameter, and then divided the result by the moon-earth distance. Then, I took the inverse tangent of the result.

I get 51.92 degrees. My college website is telling me this is wrong. Do you get a different answer?