Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 211
A Ans. 939.634 yards. … 5. Wanting to know thehorizontal distance between twoinaccessible objects A and B,and not finding any stationfrom which both of them couldbe seen, two points C and D,were chosen, at a distance fromeach other, equal to 200 yards ; from the former of these pointsA could be seen, and from the latter…
Geometry · Plane trigonometry
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