 | Charles Davies - Navigation - 1841 - 414 pages
...AC' in the diagram. The difference of longitude CC may then be found by me following proportion. I. As radius is to the tangent of the course, so is the...difference of latitude to the difference of longitude. But if the departure be given instead of the course, then, II. As the true difference of latitude,... | |
 | Charles Davies - Navigation - 1835 - 388 pages
...in the diagram. The difference of longitude CC may then be found by the following proportion. I. Ai radius is to the tangent of the course, so is the...difference of latitude to the difference of longitude. But if the departure be given instead of the course, then, II. A* the true difference of latitude,... | |
 | Charles William Hackley - Trigonometry - 1851 - 536 pages
...opposite. The following is tho rule. 1. The tangent of the course X meridional difference of latitude = the difference of longitude ; or if the departure be given instead of the course, then from the similar triangles AB'B, AC'C, the proportion will be 2. As the proper difference of latitude... | |
 | Jeremiah Day - Geometry - 1851 - 418 pages
...radius, Rad. : Tan. A : : AL : DL ; that is, THEOREM II. As RADIUS, To THE TANGENT OF THE COURSE J So IS THE MERIDIONAL DIFFERENCE OF LATITUDE, TO THE DIFFERENCE OF LONGITUDE. By this theorem, the difference of longitude may be calculated, without previously finding the departure.... | |
 | Charles William Hackley - Trigonometry - 1851 - 524 pages
...triangles AB'B, AC'C, the proportion will be 2. As the proper difference of latitude is to the departure, so is the meridional difference of latitude to the difference of longitude. Other proportions immediately suggest themselves from the preceding figure. * Observe that the meridional... | |
 | Charles Davies - Navigation - 1854 - 446 pages
...diagram. The difference of longitude denoted by C'O may then be found by the following proportion. I. As radius is to the tangent of the course, so is the...difference of latitude to the difference of longitude. But if the departure be given instead of the course, then, II. As the proper difference of latitude... | |
 | Charles Davies - Navigation - 1857 - 424 pages
...diagram. The difference oflongitude denoted by G'C may then be found by the following proportion. I. As radius is to the tangent of the course, so is the meri~ dional difference of latitude to the difference of longitude. But if the departure be given instead... | |
 | Charles Davies - Navigation - 1866 - 426 pages
...diagram. The difference of longitude denoted by O'C may then be found by the following proportion. . I. As radius is to the tangent of the course, so is the meridional difference of latitude to tiie difference of longitude. But if the departure be given instead of the course, then, II. As the... | |
 | Gerardus Beekman Docharty - Geometry - 1867 - 474 pages
...departure is to the difference of longitude. Again, in the triangle ADE we have R:tan. A::AE:ED; or, as radius is to the tangent of the course, so is the...difference of latitude to the difference of longitude. Or the formula 11. diff. long.—mer. diff. lat.xtan. course. EXAMPLES. 1. A ship, from latitude 49°... | |
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To THE TANGENT OF THE COURSE ; So IS THE MERIDIONAL DIFFERENCE OF LATITUDE, To THE DIFFERENCE OF LONGITUDE. By this theorem, the difference of longitude may be calculated, without previously rinding the departure. 
