Plane trigonometry, and its application to mensuration and land surveying. Accompanied with all the necessary logarithmic and trigonometric tables (1852)
Perkins, George R. (George Roberts), 1812-1876 · New York, D. Appleton · leaf 107
°. Hence we findits area by Second Rule, Prob. III.,Chap. V., as follows: log. 5-08 = 0-705864 log. 4-18= 0-621176 sin. 91° 15 = 9-999897 … 11-326937subtract, constant = 10*301030 log. area= 1*025907 Area = 10-6147 sq. ch. § 71.] SURVEYING. 97 By Theorem II, Chap. IV., we have ar. co. log. 9-26 = 9-033389 log. 0-90 = 1-954243 cot. 45° 37 30 = 9-990524 •J Sum =| Diff. = = 44° 22 30 = 5° 25 56 BCA =BAC = : 49° 48 26= 38° 56 34 tang, of j…
Plane trigonometry · Surveying
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