 | Alfred Challice Johnson - 1865 - 166 σελίδες
...— • . S1n. (a — p) 17. Two observers, a miles apart, and on different sides of it, . observe the angles of elevation of a balloon, in the same vertical plane with them, to be в and ф respectively ; show that the altitude of the , ., a . Sin. в . Sin. ф baUo0n... | |
 | Alfred Challice Johnson - 1871 - 178 σελίδες
...river's breadth = Sin. (a - ß) 17. Two observers, a miles apart, and on different sides of it, observe the angles of elevation of a balloon, in the same vertical plane with them, to be 9 and ф respectively ; show that the altitude of the , .. a . Sin. в . Sin. ф balloon... | |
 | James William Nicholson - 1898 - 204 σελίδες
...angles at the base F1o. 50. are 30°, 120°. Find the other sides and the altitude. 12. Two men 1000 yd. apart on a plain, and facing each other, find that...angles of elevation of a balloon in the same vertical plain with themselves are 53° and 79° 12', respectively. Find the distance from the balloon to each... | |
 | George Albert Wentworth - 1903 - 422 σελίδες
...1.77498 : 59. 564. : C9.564 miles. 11. Two observers 5 miles apart on a plain, and facing each oilier, find that the angles of elevation of a balloon in...balloon to each observer, and also the height of the ballouii above the plain. В= 58° A = 55° A + В = 113a .-. C = 67°. logc = 0.69897 cologsin C =... | |
 | George Wentworth, David Eugene Smith - 1914 - 338 σελίδες
...nonparallel sides. Compute the results when a = 15, b = 7, x = 70°, y = 40°. 20. Two observers 5 mi. apart on a plain, and facing each other, find that...themselves are 55° and 58° respectively. Find the dis| tance from the balloon to each observer, and also the height of the balloon above the plain. 2Í.... | |
 | John Wesley Young, Albert John Schwartz - 1915 - 250 σελίδες
...24 ft. and 32 ft., and an included angle is 45°, find the sides and the area. 8. Two observers 5.0 miles apart on a plain, and facing each other, find...balloon in the same vertical plane with themselves are 58° and 65°, respectively. Find the distances from the balloon to the observers, and also the height... | |
 | John Wesley Young, Frank Millett Morgan - 1917 - 586 σελίδες
...length of the other diagonal and the other side. How many solutions ? 6. Two observers 4 miles apart, facing each other, find that the angles of elevation...balloon in the same vertical plane with themselves are 60° and 40° respectively. Find the distance from the balloon to each observer and the height of the... | |
 | John Wesley Young, Frank Millett Morgan - 1923 - 154 σελίδες
...length of the other diagonal and the other side. How many solutions ? 6. Two observers 4 miles apart, facing each other, find that the angles of elevation...balloon in the same vertical plane with themselves are 60" and 40° respectively. Find the distance from the balloon to each observer and the height of the... | |
 | Leonard Eugene Dickson - 1922 - 225 σελίδες
...bore N 67° W. Find the distance from the lighthouse to the ship in each position. 10. Two observers 7 miles apart on a plain, and facing each other, find...balloon in the same vertical plane with themselves are 60° and 75°. Find the distance of the balloon from each observer and its height. 11. At one place... | |
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Two observers 5 miles apart on a plain, and facing each other, find that the angles of elevation of a balloon in the same vertical plane with themselves are 55° and 58°, respectively. 