 | War office - 1861 - 260 pàgines
...computation. 7. Find the greatest angle of the triangle whose sides are 250, 180, 120 feet respectively. 8. What is the angle of depression of an object ? From the top of a hill I observed two mile stones on a level road in the same direction from me, the angle of depression of... | |
 | War office - 1861 - 714 pàgines
...half the sum of the angles opposite to these sides, is to the tangent of half their difference. 3. What is the angle of depression of an object ? From the top of a hill I observed two milestones on a level road in the same direction from me, the angle of depression of... | |
 | John Walmsley - 1865 - 232 pàgines
...the tower to be 15° from S. How far is it from tower to steeple ? Given cot 75° = -26 nearly. 16. From the top of a hill the angles of depression of...12° 13' and 2° 45': find the height of the hill. Given tan 2° 45' = -048, tan 12° 13' = -217. 17. From the edge of one bank of a river a person ascends... | |
 | James Robert Christie - 1866 - 428 pàgines
...and у respectively. Find the distance between the objects ; the height of the tower being h. 812. From the top of a hill the angles of depression of two objects in the plain at its base were observed to be 45° and 30°, and the horizontal angle between... | |
 | James Hamblin Smith - 1877 - 244 pàgines
...bottom of the wall the flagstaff subtends an angle of 10°. Find the distance of E from the wall. (28) From the top of a hill the angles of depression of...two consecutive mile-stones on a straight level road are found to bo 12°. 13' and 2°. 45'. Find the height of the hill (29) From the top of a tower by... | |
 | 1881 - 504 pàgines
...the secant in terms of the cotangent. Give the proper sign for an angle between 180° and 225°. 3. From the top of a hill the angles of depression of two consecutive milestones were observed to be 30° and 15°. What was the height of the hill ? 4. Name the simple machines, and... | |
 | George Albert Wentworth - 1882 - 234 pàgines
...its foot it will reach a window 21 feet high on the other side. Find the breadth of the street. 71. From the top of a hill the angles of depression of two successive milestones, on a straight level road leading to the hill, are observed to be 5° and 15°.... | |
 | George Albert Wentworth - 1884 - 330 pàgines
...its foot it will reach a window 21 feet high on the other side. Find the. breadth of the street. 71. From the top of a hill the angles of depression of two successive milestones, on a straight level road leading to the hill, are observed to be 5° and 15°.... | |
 | George Albert Wentworth - 1887 - 206 pàgines
...the elevation of the column, at the observer's station, is 45°. Find the height of the column. 62. From the top of a hill the angles of depression of two objects situated in the horizontal plane of the base of the hill are 45° and 30° ; and the horizontal... | |
 | George Albert Wentworth - 1887 - 346 pàgines
...its foot it will reach a window 21 feet high on the other side. Find the breadth of the street. 71. From the top of a hill the angles of depression of two successive milestones, on a straight level road leading to the hill, are observed to be 5° and 15°.... | |
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From the top of a hill the angles of depression of two successive milestones, on a straight level road leading to the hill, are observed to be 5° and 15°. 
