Find the length of the parallels of latitude 42 degree north
2 answers
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at latitude d, the radius of the cross-section of earth is
r = R cos(d)
where R is the radius at the equator.
So, the circumference there is 2pi*r
r = R cos(d)
where R is the radius at the equator.
So, the circumference there is 2pi*r
3 answers