Wood, De Volson, 1832-1897. [from old catalog] · New York, J. Wiley & sons · leaf 43
walk southwesterly. To find the direction, draw a line, AB, of anylength to represent the one miledue east, and a line, A C, perpendic-ular to AB, and of such lengththat the hypothenuse, BO, will bethree times as long as AB ; thenwill the angle ^LB6represent therequired direction.We have cos B = i…
Mechanics
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