 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.  Plane Trigonometry - Page 42by Sidney Luxton Loney - 1893 - 480 pagesFull view - About this book
 | Frank Castle - Mathematics - 1899 - 424 pages
...base of 100 yards measured from its foot, is 30° ; find its height. 4. From the top of a tower 150 feet high the angles of depression of the top and bottom of a vertical column, standing on the same horizontal plane, were observed to be 22° 15' and 44 30'; find... | |
 | Levi Leonard Conant - Plane trigonometry - 1909 - 290 pages
...corresponding 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 top... | |
 | 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 top... | |
 | William Ernst Paterson - Logarithms - 1911 - 262 pages
...15° and 65° 30' at the same moment. Find the height of the balloon. 10. From the top of a tower, 108 feet high, the angles of depression of the top and bottom of a vertical column are found to be 30° and 60° respectively. What is the height of the column ? 11.... | |
 | 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... | |
 | George Neander Bauer, William Ellsworth Brooke - Trigonometry - 1917 - 196 pages
...distance between the stations being 145 ft. 122. From the summit of a hill, 360 ft. above a plain, the angles of depression of the top and bottom of a tower standing on the plain were 41° and 54° ; required the height of the tower. 123. At one side of a... | |
 | E.S.Ramasamy - 2006 - 838 pages
...<90°, then the value of tan x is equal to: a) V3 b) 1 c) 59. From the top of a building 90 metres high, the angles of depression of the top and bottom of a tree are 30° and 45° respectively. The height of the tree, in metres, is: 8)30>/3 0)90-30>/3 c) 90... | |
 | University of St. Andrews - 1913 - 1004 pages
...to determine the width of a river from measurements made on one bank. If at the top of a tower 100 feet high the angles of depression of the top and bottom of a column are 30° and 45° respectively, find the horizontal distance between the tower and the column.... | |
 | 1926 - 182 pages
...= 5", CB = CD = 8", BD = 6". Find AC and the angles of the kite. 46. From the top of a building 50 feet high, the angles of depression of the top and bottom of a flagstaff stuck in the ground are 10° and 15°. Find the height of the flagstaff and its distance... | |
 | 646 pages
...found to be - . Find the height of the tower. [ICSE 1990, CBSE 1994] 1 6. From the top of a tower 50 m high the angles of depression of the top and bottom of a pole are observed to be 45° and 60° respectively. Find the height of the pole. 1 7. Two men on either... | |
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