Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 211
210 TRIGONOMETRY, Application 4. Wanting to know the horizon-tal distance between two inaccessi-ble objects E and Wy the followingmeasurements were made, f AB = 536 yardsBAW — 40° 16WAE = 57° 40ABE = 42° 22EBW= 71° 07required the distance EW. … A Ans. 939.634 yards.
Geometry · Plane trigonometry
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