A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 540
5. Their Variations in Length. As the point M moves around thecircle, and the arc thus increases, thesines, tangents, and secants, startingfrom zero, also increase; till, whenthe point M has arrived at B, andthe arc has become 90°, the sine hasbecome equal to radius, or unity, andthe tangent and… … 526 APPENDIX A. When the point M has passed the first quadrant at B, and is proceeding toward0, the sines, tangents, and secants begin to decrease, till, when the point hasreached 0, they have the same values as at A. They then begin to increaseagain, and so on. The table on page 527 indicates…
Surveying
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