 | John Huntington Crane Coffin - Nautical astronomy - 1898 - 240 pages
...observations. A small error may also result from the assumption that * Differentiating equation (76) sin h = sin L sin d + cos L cos d cos t, regarding h and t as variables, we have cos hd /< = — cos L cos d sin tdt but cos d sin t = cos h... | |
 | William Carpenter Pendleton Muir - Nautical astronomy - 1906 - 754 pages
...s^ ^3 *9 f • 1 . . . u, • ?• "5 "M £E ouo CD o O*« a navigator who may have Inman's Tables, the following formula for latitude is recommended...the calculation. Taking the fundamental formula, sin A = sin L sin d -(- cos L cos d cos t and substituting for cos í its equivalent 1 — • versin t,... | |
 | Charles Lane Poor - Aeronautics - 1918 - 162 pages
...relation between these three quantities and the hour angle, t, and this relation is expressed by the formula sin h = sin L sin D + cos L cos D cos t, and this formula is the fundamental formula upon which the whole of navigation rests. It is Fig. 3. Finding... | |
 | Karl Hilding Beij - Aeronautics - 1928 - 56 pages
...cos 0 cos p + sin 0 sin p cos t and •- =-— , sin A sin t which may be reduced to— sin p sin z sin h = sin L sin D + cos L cos D cos t {I) and sin A = cos D sec h sin t (II) giving expressions for the altitude and azimuth, respectively.... | |
 | Nathaniel Bowditch - Nautical astronomy - 1931 - 866 pages
...table : havz = hav (Co. LP. D.) + {hav (Co. L+PD)-hav (Co. LP. D.)}hav«. These are modifications of the fundamental formula : sin h = sin L sin d + cos L cos d cos t, which is itself often preferred for the computation of the altitude from the latitude, declination,... | |
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From the law of cosines derive the formula sin h = sin L sin d + cos L cos d cos t. 