 | Henry Hunt Ludlow - Logarithms - 1891 - 322 pages
...difference in longitude, determine the required distance. 11. From a point 108 ft. above a horizontal plane the angles of depression of the top and bottom of a tower standing on the plane are 30° and 60°, respectively. Find the height of the tower. Ant. ^л ft 12. Area of a Circular... | |
 | United States. War Department - 1896 - 1256 pages
...to be determined. [Weight, 2.] 2. Trigonometry. — From a point 108 feet above a horizontal plane the angles of depression of the top and bottom of a tower standing on the plane are 30° and 60°, respectively. Hud the height of the tower. [Weight, 3.] 3. Trigonometry. —... | |
 | Levi Leonard Conant - Plane trigonometry - 1909 - 290 pages
...angle of elevation is 60°. What is the height of the spire? 72. From the top of a cliff 150 ft. high the angles of depression of the top and bottom of a tower are 30° and 60°, respectively. What is the height of the tower? 73. The angles of elevation of the... | |
 | Levi Leonard Conant - Trigonometry - 1909 - 320 pages
...angle of elevation is 60°. What is the height of the spire? y 72. From the top of a cliff 150 ft. high the angles of depression of the top and bottom of a tower are 30° and 60°, respectively. What is the height of the tower? 73. The angles of elevation of the... | |
 | Queensland. Department of Public Instruction - Education - 1916 - 244 pages
...Show also that the circles circumscribing the two triangles have the same radius. 7. From a balloon the angles of depression of the top and bottom of a tower h feet high are a and /?. Find a formula suitable for logarithmic calculation for the height of the... | |
 | B. S. Vatssa - 2002 - 1512 pages
...coto, coto cot0 are in (a) OP (b)AP (с) Н.Р. (d) None of these. Ans. (b) 5. From the top of a spire, the angles of depression of the top and bottom of a tower of height h are 0 and <j>. Show that the height of the spire and its horizontal distance from the tower... | |
 | 280 pages
...of the required distances are equal to 236-6... feet. Ex. 3. From the top of a cliff, 200 feet high, the angles of depression of the top and bottom of a tower are observed to be 30° and 60° ; find the height of the tower. Let A be the point of observation,... | |
 | 646 pages
...in the swimming pool is 60°. Find the height of the cloud. 25. From the top of a cliff 1 00 m high the angles of depression of the top and bottom of a tower are observed to be 30° and 60° respectively. Find the height of the tower. 26. A kite is flying at... | |
 | 460 pages
...sides, it just gets immersed. What fraction of the water overflows? (b) From the top a cliff 100 m high, the angles of depression of the top and bottom of a tower are observed to be 30° and 60° respectively. Find the height of the tower. (c) Using ruler and compasses... | |
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From the top of a cliff 150 ft. high the angles of depression of the top and bottom of a tower are 30° and 60°, respectively. 