 | John Maximilian Dyer - Plane trigonometry - 1891 - 306 pages
...and e = 32, calculate the angle A. 9. Looking out of a window, with his eye at the height of 15 feet above the roadway, an observer finds that the angle of elevation of the top of a telegraph post is 17° 18' 35", and that the angle of depression of the foot of the post is 8° 32' 15" ; calculate... | |
 | Henry Sinclair Hall, Samuel Ratcliffe Knight - Plane trigonometry - 1893 - 434 pages
...the distance of the nearer milestone in miles. 6. An observer whose eye is 15 feet above the roadway finds that the angle of elevation of the top of a telegraph post is 17° 18' 35", and that the angle of depression of the foot of the post is 8° 32' 15" : find... | |
 | Daniel Alexander Murray - Plane trigonometry - 1899 - 226 pages
...subtend to an observer ou the same level with the foot of the base, and 100 yds. distant from it ? 12. Looking out of a window with his eye at the height...that the angle of elevation of the top of a telegraph post is 17° 18' 35", and that the angle of depression of the foot of the post is 8° 32' 15". Calculate... | |
 | Charles Hamilton Ashton, Walter Randall Marsh - Trigonometry - 1902 - 186 pages
...subtend an angle of 6°. Find the diameter of the fort. 3. The parallel sides of a trapezoid are 1C and 23 ft. The \/ angles at the extremities of the...pole and its distance from the observer. / 6. A and В are two points, 200 yards apart, on the bank of a river, and С is a point on the opposite bank.... | |
 | Daniel Alexander Murray - 1906 - 466 pages
...subtend to an observer ou the same level with the foot of the base, and 100 yds. distant from it ? ' 12. Looking out of a window with his eye at the height...that the angle of elevation of the top of a telegraph post is 17° 18' 35", and that the angle of depression of the foot of the post is 8° 32' 15". Calculate... | |
 | Daniel Alexander Murray - Plane trigonometry - 1908 - 358 pages
...subtend to an observer on the same level with the foot of the base, and 10O yds. distant from it ? 12. Looking out of a window with his eye at the height...that the angle of elevation of the top of a telegraph post is 17° 18' 35", and that the angle of depression of the foot of the post is 8° 32' 15". Calculate... | |
 | W. G. Borchardt, A. D. Perrott - Trigonometry - 1928 - 492 pages
...find the value of 4 cot A + 5 sec A 3 cos A -i- 8 sin A ' 4. From a window, with his eye 15 decimetres above the roadway, an observer finds that the angle of elevation of the top of a telegraph post is 17° 18' and that the angle of depression of the foot of the post is 8° 32'. Calculate correct... | |
 | 1926 - 182 pages
...43-8 cms. Find the three altitudes. 6. Looking out of a window, with his eye 15 ft. above the road, an observer finds that the angle of elevation of the top of a telegraph pott is 17° 19', and the angle of depression of the bottom of the post is 8° 32'. Find the height... | |
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... 12. Looking out of a window with his eye at the height of 15 ft. above the roadway, an observer finds that the angle of elevation of the top of a telegraph post is 17° 18' 35", and that the angle of depression of the foot of the post is 8° 32 