 ... foot of the post is 8° 32' 15". Calculate the height of the telegraph post and its distance from the observer. 13. A man in a balloon, when it is one mile high, finds the angle of depression of an object on the level ground to be 35° 20', then after...  Plane and Spherical Trigonometry - Pàgina 28per Preston Albert Lambert - 1905 - 98 pàginesVisualització completa - Sobre aquest llibre
 | Samuel H. Winter - 1877 - 452 pàgines
...horizontal ground to be 35° 20'; then, after ascending vertically and uniformly for 20 minutes, he observes the angle of depression of the same object to be 55°...the rate of ascent of the balloon in miles per hour. 11. A tower which stands on a horizontal plane is 200 feet high, and there is a small loophole in the... | |
 | Woolwich roy. military acad, Walter Ferrier Austin - 1880 - 190 pàgines
...horizontal ground to be 35° 20', then after ascending vertically and uniformly for 20 minutes, he observes the angle of depression of the same object to be 55°...the rate of ascent of the balloon in miles per hour. 11. A tower which stands on a horizontal plane is 200 feet high, and there is a small loophole in the... | |
 | John Maximilian Dyer - 1891 - 306 pàgines
...observes the angle of depression of an object on the ground to be 30°. After ascending vertically for 25 minutes he finds the angle of depression of the same object to be 60°. Find the rate of ascent of the balloon in miles per hour. (7) If 3 sin2 В + 2 sin2 A = 1, and... | |
 | Daniel Alexander Murray - 1899 - 350 pàgines
...object on the level ground to be 35° 20', then after ascending vertically and uniformly for 20 min., he finds the angle of depression of the same object...the rate of ascent of the balloon in miles per hour. 14. A man observes the elevation of a mountain top to be 15°, and after walking 3 mi. directly toward... | |
 | Elmer Adelbert Lyman, Edwin Charles Goddard - 1899 - 188 pàgines
...35° 20'. After ascending vertically and uniformly for 10 in ins., he observes the depression angle of the same object to be 55° 40'. Find the rate of ascent of the balloon in miles per hour. 8. A statue 10 ft. high standing on a column subtends, at a point 100 ft. from the base of the column... | |
 | Elmer Adelbert Lyman - 1900 - 218 pàgines
...be 35° 20'. After ascending vertically and uniformly for 10 mins., he observes the depression angle of the same object, to be 55° 40'. Find the rate of ascent of the balloon in miles per hour. 8. A statue 10 ft. high standing on a column subtends, at a point, 100 ft. from the base of the column... | |
 | Elmer Adelbert Lyman, Edwin Charles Goddard - 1900 - 228 pàgines
...35° 20'. After ascending vertically and uniformly for 10 rains., he observes the depression angle of the same object to be 55° 40'. Find the rate of ascent of the ball00n in miles per hour. 8. A statue 10 ft. high standing on a column subtends, at a point 100 ft.... | |
 | Daniel Alexander Murray - 1906 - 466 pàgines
...object on the level ground to be 35° 20', then after ascending vertically and uniformly for 20 min., he finds the angle of depression of the same object...the rate of ascent of the balloon in miles per hour. 14. A man observes the elevation of a mountain top to be 15°, and after walking 3 mi. directly toward... | |
 | Daniel Alexander Murray - 1908 - 358 pàgines
...object on the level ground to be 35° 20', then after ascending vertically and uniformly for 20 min., he finds the angle of depression of the same object...the rate of ascent of the balloon in miles per hour. 14. A man observes the elevation of a mountain top to be 15°, and after walking 3 mi. directly toward... | |
 | Oswald Tower - 1922 - 196 pàgines
...depression of an object on the level ground to be 35° 20', then after ascending vertically some distance, he finds the angle of depression of the same object to be 55° 40'. What distance did he ascend between measurements? 17. Find the height of a chimney if the angle of... | |
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