 | William Frothingham Bradbury - Plane trigonometry - 1864 - 324 pages
...the church ? 6. When a tree 25 feet high casts a shadow 100 feet long, what is the sun's altitude ? 7. From the base of a tower, the angle of elevation...horizontal plane, what is the height of the second ? 8. Having run a line 85 rods S. 45° E., I came to an impassable marsh, and, sending a man round... | |
 | John Bascombe Lock - 1882 - 378 pages
...observed to be 45°. What is the height of the column 1 (2) At a point 200 feet from, and on a level with the base of a tower, the angle of elevation of the top of the tower is observed to be 60° : what is the height of the tower? (3) From the top of a vertical... | |
 | John Bascombe Lock - Trigonometry - 1885 - 368 pages
...observed to be 45°. "What is the height of the column ? (2) At a point 200 feet from, and on a level with the base of a tower, the angle of elevation of the top of the tower is observed to be CO0 : what is the height of the tower? (3) From the top of a vertical... | |
 | Henry Sinclair Hall, Samuel Ratcliffe Knight - Plane trigonometry - 1893 - 434 pages
...of 27° 2' to the horizon : find their heights, given tan 27° 2' = -51. Example II. From the foot of a tower the angle of elevation of the top of a column ia 60°, and from the top of the tower, which is 50ft. high, the angle of elevation is 30°:... | |
 | John Bascombe Lock - Logarithms - 1896 - 244 pages
...observed to be 45* ; what is the height of the column ? 2. At a point 200 feet from, and on a level with the base of a tower, the angle of elevation of the top of the tower is observed to be 00* ; what is the height of the tower Ч 9. From the top of ^a vertical... | |
 | 1897 - 154 pages
...the similar and similarly described figures on the sides containing the right angle. 6. From the foot of a tower the angle of elevation of the top of a column is 60°, and from the top of the tower, which is 30 feet high, the augie of elevation is 30";... | |
 | Andrew Wheeler Phillips, Wendell Melville Strong - Trigonometry - 1898 - 362 pages
...angle of depression of P if O is the point of observation. (1t.) At a hori2ontal distance of 253 ft. from the base of a tower the angle of elevation of the top is 60° 20'; find the height of the tower. (12.) From the top of a vertical cliff 85 ft. high the angle... | |
 | Herbert Coleman Whitaker - Trigonometry - 1898 - 216 pages
...160 feet from the foot of the tower. Find the height of the tower. 149. At a distance of 296 feet (a) from the base of a tower, the angle of elevation of the top is three times as great as the angle of elevation seen from a point 208 feet (6) nearer the base. Find... | |
 | Daniel Alexander Murray - Plane trigonometry - 1899 - 226 pages
...examples are given here ; others will be given later. JL. At a point 150 ft. from, and on a level with, the base of a tower, the angle of elevation of the top of the tower is observed to be 60°. Find the height of the tower. Let AB be the tower, and P the point... | |
 | Thomas Ulvan Taylor, Charles Puryear - Trigonometry - 1902 - 242 pages
...angle of 46° 24'. Find the side of the inscribed square. Ans. 28.72 inches. 15. At a point 50 feet from the base of a tower the angle of elevation of the top was found, by the use of a transit, to be 68° 18'. If the height of the instrument was 4.75 feet,... | |
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At a point 200 feet from, and on a level with the base of a tower, the angle of elevation of the top of the tower is observed to be 60° : what is the height of the tower? 
