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The formula for convergency between two meridians is:

A

Change of longitude × cos(latitude)

B

Change of latitude × cos(longitude)

C

Change of latitude × sin(longitude)

D

Change of longitude × sin(latitude)

Correct

Explanation

Convergency = change of longitude × sin(mean latitude). At the equator (sin 0 = 0) convergency is zero; at the poles (sin 90 = 1) it equals the change of longitude.

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