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For a sphere of radius 'a' at latitude 'φ' and the length of a one-degree longitude (or π/180 radians) arc is (π/180)*a*cosφAt equator, φ = 0. Hence, cosφ = 1
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SANTOSH KUMAR
June 21, 2018For a sphere of radius 'a' at latitude 'φ' and the length of a one-degree longitude (or π/180 radians) arc is (π/180)*a*cosφ
At equator, φ = 0. Hence, cosφ = 1