| Charles Hutton - 1788 - 703 pages
...2-7474774 (tan. 70°) : : 80 : 2'7473774'X So = 219-790192 feet := AC the diftance required. EXAMPLE IV. **What is the perpendicular height of a hill whofe angle...elevation, taken at the bottom of it, was 46° ; and** 100 yards farther off, on a level with the bottom of it, the angle was 31*; Ac 46° "1 ,- , B ZB 3I... | |
| John Brown (Mathematician) - 1789 - 40 pages
...PROPOSlTlON Xlv!. PROB. To meafure an inaccejjtble height and dißance by the geometrical quadrant. Ex. 1. **What is the perpendicular height. of a hill whofe angle of elevation** near the bottom is .33o 201 and 125 yards farther off 28o 301, and what the diftance of the perpendicular... | |
| 1801 - 426 pages
...inaccessible. t . EXAMPLES. . ,... „• . .. r. What is the perpendicular height of a htH, ..„ **angle of elevation, taken at the bottom of it, was 46" , and** 100 yards further off, on a level with the bottom of it, the angle was 31°? ,. BC Subtract 9-4129962... | |
| Elias Loomis - 1855 - 178 pages
...the hypothenuse and the angles to find DC. Ex. 1. What is the perpendicular height of a hill whose **angle of elevation, taken at the bottom of it, was 46° ; and** 100 yards farther off, on a level with the bottom of it, the angle was 31° ? Ans., 143.14 yards. Ex.... | |
| ELIAS LOOMIS, LL.D. - 1859
...the hypothenuse and the angles to find DC. Ex. 1. "What is the perpendicular height of a hill whose **angle of elevation, taken at the bottom of it, was 46° ; and** 100 yards farther off, on a level with the bottom of it, the angle was 31° ? Ans., 143.14 yards. Ex.... | |
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