 | Sidney Luxton Loney - Plane trigonometry - 1893 - 534 pages
...mile further away in a direct line its elevation is 10° 12' ; find the height of the mountain. 17. From the top of a hill the angles of depression of two successive milestones, on level ground and in the same vertical plane with the observer, are found to be 5° and 10° respectively.... | |
 | Henry Sinclair Hall, Samuel Ratcliffe Knight - Plane trigonometry - 1893 - 434 pages
...boats at sea, each due north of the observer, are 30° and 15° : how far are the boats apart ? 17. From the top of a hill the angles of depression of two consecutive milestones on a level road running due south from the observer are 45° and 22° respectively.... | |
 | Sidney Luxton Loney - Plane trigonometry - 1895 - 544 pages
...further away in a direct line, its elevation is 10° 12' ; find the height of the mountain. 17. Prom the top of a hill the angles of depression of two successive milestones, on level ground and in the same vertical plane with the observer, are found to be 5° and 10° respectively.... | |
 | George Albert Wentworth - Navigation - 1895 - 436 pages
...the elevation of the column, at the observer's station, is 45°. Find the height of the column. 62. From the top of a hill the angles of depression of two objects situated in the horizontal plane of the base of the hill are 45° and 30° ; and the horizontal... | |
 | George Albert Wentworth - Trigonometry - 1896 - 394 pages
...45° =9. 84949 colog sin 67° 30' = 0.03438 log6 = 1.78696 b- 61.23. Height of column, 61.23 ft. 62. From the top of a hill the angles of depression of two objects situated in the horixontal plane of the base of the hill are 45° and 30°, and the horixontal... | |
 | George Albert Wentworth - Trigonometry - 1896 - 344 pages
...the elevation of the column, at the observer's station, is 45°. Find the height of the column. 62. From the top of a hill the angles of depression of two objects situated in the horizontal plane of the base of the hill are 45° and 30° ; and the horizontal... | |
 | George Albert Wentworth - Plane trigonometry - 1896 - 272 pages
...the elevation of the column, at the observer's station, is 45°. Find the height of the column. 62. From the top of a hill the angles of depression of two objects situated in the horizontal plane of the base of the hill are 45° and 30° ; and the horizontal... | |
 | George Albert Wentworth - Logarithms - 1897 - 266 pages
...east. 61. In front of a window 20 feet high is a flower-bed 6 feet wide. How long must a ladder be to reach from the edge of the bed to the window ? 62....milestones, on a straight level road leading to the '\t I hill, are observed to be 5° and 15°. Find the height of the hill. 64. A fort stands on a horizontal... | |
 | George Albert Wentworth - Logarithms - 1897 - 384 pages
...the elevation of the column, at the observer's station, is 45°. Find the height of the column. 62. From the top of a hill the angles of depression of two objects situated in the horizontal plane of the base of the hill are 45° and 30° ; and the horizontal... | |
 | George Albert Wentworth - Trigonometry - 1899 - 392 pages
...tan К'. log 21 = 1.32222 log tan B' = 0.20982 log6' = 1.53204 6' = 34.044 6 = 22.606 b + b' - 50.650 63. From the top of a hill the angles of depression of two succсssive milestones, on a straight level road leading to the hill, are observed to be 5° and 15°.... | |
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From the top of a hill the angles of depression of two objects situated in the... 
