| Jeremiah Day - Geometry - 1839 - 370 pages
...any two contiguous sides make with each other, may be known by the following rules. 1. If one course **is North and the other South, one East and the other West ; subtract the less** from the greater. 2. If one is North and the other South, but both East or West ; add them together.... | |
| Jeremiah Day - Geometry - 1851
...any two contiguous sides make with each other, may be known by the following rules. 1. If one course **is North and the other South, one East and the other West ; subtract the less** from the greater. 2. If one is North and the other South, but both East or West ; add them together.... | |
| William Smyth - Navigation - 1855 - 223 pages
...drawing meridian lines though the corners. The angles may be found by the following rules. 1°. If the **bearing of one of the sides is north and the other...other west, subtract the less course from the greater.** 2°. If one is north and the other south, and both east or west, add both courses together. 3°. If... | |
| Elias Loomis - Trigonometry - 1855 - 178 pages
...If one is north and the other south, but both east or west, subtract their sum from 180°. 4. If one **is north and the other south, one east and the other west, subtract** their difference from 180°. Thus the angle CAB is equal to NAB-NAC. The angle CAD is equal to NAC... | |
| ELIAS LOOMIS, LL.D. - 1859
...If one is north and the other south, but both east or west, subtract their sum from 180°. 4. If one **is north and the other south, one east and the other west, subtract** their difference from 180°. Thus the angle CAB is equal to NAB-NAC. The angle CAD is equal to NAG... | |
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