A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 48
is the secant ofthe arc AB, or of its supplement BDE. 5. The cosecant of an arc, is the secant of the complement.Thus, GL, the secant of BD, is the cosecant of AB. 6. The versed sine of an arc is the difference between the cosineand the radius ; that is, AF is the versed sine of the arc AB, andDK… … 46 SURVEYING. From the preceding definitions we deduce the following obviousconsequences : 1st, That when the arc AB, becomes so small as to call itnothing, its sine tangent and yersed sine are also nothing, and itssecant and cosine are each equal to radius. 2d, The sine and versed sine of a…
Surveying · Navigation
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