A system of geometry and trigonometry, with a treatise on surveying; in which the principles of rectangular surveying, without plotting, are explained (1835)
Flint, Abel, 1765-1825, Gillet, George · Hartford, Belknap & Hamersley; New York, Cooke & Co. · leaf 87
rches.BC is an east and vv^est line, ofcourse the angle at B contains 90^,or it is a right angle. AC is maderadius. From the point at A, thearch Ca is described. From the point at C, the arch Az isdescribed. BC is the sine of the angle at A, or of the archCa, and AB is the co-sine. AB is the sine… … TO FIND THE REQUIRED SIDES TAKE THE FOLLOWING RULE. For the latitude, make radius, the angle at B, the firstterm,—the logarithm of the side AC 50, the second; thesine of the angle at C, the third, and the fourth will be thelogarithm of the latitude AB. For the departure, take thesame first and…
Surveying
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