 | Elias Loomis - Trigonometry - 1855 - 192 pages
...angle A equal to 142° 25'. What is the distance between the objects C and B ? PROBLEM VI. Ans. (148.) To find the height of an inaccessible object above a horizontal plane. First Method.—Take two stations in a vertical plane passing through the top of the object; measure... | |
 | Elias Loomis - Logarithms - 1859 - 372 pages
...angle A equal to 142° 25'. What is the distance between the objects C and B ? Ans. PROBLEM VI. (148.) To find the height of an inaccessible object above a horizontal plane. First Method. — Take two stations in a vertical plane passing through the top of the object ; measure... | |
 | Benjamin Greenleaf - Geometry - 1862 - 518 pages
...the fort, are 18° 52' 13" and 152° 11' 42". Required the distance of each ship from the fort. 136. To find the height of an inaccessible object above a horizontal plane. First Metho.d. Let B be the top of the object, and let it be required to find the height B 0. Measure... | |
 | Benjamin Greenleaf - Geometry - 1863 - 504 pages
...the fort, are 18° 52' 13" and 152° 11' 42". Required the distance of each ship from the fort. 136. To find the height of an inaccessible object above a horizontal plane. First Method. Let B be the top of the object, and let it be required to find the height B C. TRIGONOMETRY.... | |
 | William Frothingham Bradbury - Plane trigonometry - 1864 - 324 pages
...tree ? Angle A CD = 29°, ADB = 32°, CAD = 3°, and ABD = 99°. Ans. 57.155 feet. PROBLEM III. 93. To find the height of an inaccessible object above a horizontal plane. Thejirst method ispre- A cisely the same as the last method in Prob. II., the angle of elevation of... | |
 | Benjamin Greenleaf - 1867 - 188 pages
...the fort, are 18° 52' 13" and 152° 11' 42". Required the distance of each ship from the fort. 136. To find the height of an inaccessible object above a horizontal plane. First Method. Let B be the top of the object, and let it be required to find the height B C. Measure... | |
 | Edward Brooks - Geometry - 1868 - 284 pages
...and to the top of the tower 68° 42'; required the height of the tower. Ans. 486.747. CASE VI. 59. To find the height of an inaccessible object above a horizontal plane. F11tST METHOD.—Measure any convenient horizontal line AB directly toward the object, and take the... | |
 | William Frothingham Bradbury - Geometry - 1872 - 262 pages
...of the tree ? Angle BAD = 29°, BDC = 32°, ABD = 3°, BCD = 99°. Ans. 57.155 fI. PROBLEM III. 127. To find the height of an inaccessible object above a horizontal plane. The first method is precisely the same as the last method in Prob. II., the angle of elevation of AD... | |
 | Benjamin Greenleaf - Trigonometry - 1876 - 204 pages
...fort, are 18° 52' IS" and 152° 11' 42". Required the distance of each ship from the fort. .. 136. To find the height of an inaccessible object above a horizontal plane. First Method. Let В be the top of the object, and let it be required to find the height В G. Measure... | |
 | Thomas J. Foster - Coal mines and mining - 1891 - 444 pages
...the foot and top will be known. The difference between them is the height of the tower. CASE 6.— To find the height of an inaccessible object above a horizontal plane. Measure any convenient horizontal line A B directly toward the object, and take the angles of elevation... | |
| |
PROBLEM III. To find the height of an INACCESSIBLE OBJECT above a HORIZONTAL PLANE. 11. TAKE TWO STATIONS IN A VERTICAL PLANE PASSING THROUGH THE TOP OF THE OBJECT, MEASURE THE DISTANCE FROM ONE STATION TO THE OTHER, AND THE ANGLE OF ELEVATION AT EACH.... 
