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" Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible hill, there were measured, the angle of elevation of the top of the hill 40, and of the top of the tower 51 ; then measuring in a direct... "
Elements of Geometry and Trigonometry Translated from the French of A.M ... - Page 247
by Charles Davies - 1849 - 359 pages
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A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ...

Nathan Scholfield - Conic sections - 1845
...triangle whose sides are 5, 6, and 7. Ex. 17. Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible...angle of elevation of the top of the hill 40, and the top of the tower 51: then measuring in a direct line 180 feet farther from the hill, the angle...
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Higher Geometry and Trigonometry: Being the Third Part of a Series on ...

Nathan Scholfield - Geometry - 1845 - 506 pages
...triangle whose sides are 5, 6, and 7. Ex. 17. Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible...angle of elevation of the top of the hill 40, and the top of the tower 51: then measuring in a direct line 180 feet farther from the hill, the angle...
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Elements of Surveying, and Navigation: With a Description of the Instruments ...

Charles Davies - Navigation - 1846 - 388 pages
...required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible...measured, the angle of elevation of the top of the hill 40e, and of the top of the tower 51e; then measuring in a direct line 180 feet farther from the hill,...
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Mathematics for practical men

Olinthus Gilbert Gregory - 1848 - 572 pages
...wanting to ascertain the height of a tower standing on the top of an inaccessible hill, I took the angle of elevation of the top of the hill 40, and...top of the tower 51, then measuring in a direct Jine 180 feet farther from the hill, I took in the same vertical plane the angle of elevation of the...
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An Epitome of Navigation and Nautical Astronomy, with Improved Lunar Tables ...

Janet Taylor - Nautical astronomy - 1851 - 702 pages
...of the tower, were 40 and 51; and at the further extremity, the angle of elevation of the to-) of the tower was 33 45'. Required the height of the tower ? NAVIGATION. ELEMENTARY PRINCIPLES AND DEFINITIONS. NAVIGATION is the art of finding the latitude...
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Elements of Geometry and Trigonometry: With Applications in Mensuration

Charles Davies - Geometry - 1886 - 334 pages
...required the distance ABAns 592-967 yards3 Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible...angle of elevation of the top of the tower was 33 451 ; required tie height of the toweIAns 83-998 feetApplicatIons4 Wanting to know the horizon- + tal...
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Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1852 - 436 pages
...required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible...hill, the angle of elevation of the top of the tower was1 33 45' ; required the height of the tower. Ans. 83. 4. Wanting to know the horizontal distance...
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Elements of Surveying, and Navigation: With Descriptions of the Instruments ...

Charles Davies - Navigation - 1854 - 444 pages
...required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible...33 45' ; required the height of the tower. Ans. 83.998. 4. "Wanting to know the horizontal distance between two inaccessible objects E and W, the following...
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Elements of Geometry and Trigonometry from the Works of A.M. Legendre ...

Charles Davies - Geometry - 1854 - 436 pages
...required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible...hill, the angle of elevation of the top of the tower Cway 33 45' ; required the height of the tower. Ans. 83.998. 4. Wanting to know the horizontal distance...
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The Elements of Plane Trigonometry

James Hann - Plane trigonometry - 1854 - 119 pages
...plane, and wanting to know the height of a tower placed on the top of an inaccessible hill : I took the angle of elevation of the top of the hill 40, and...of the top of the tower 51; then measuring in a line directly from it to the distance of 200 feet farther, I found the angle at the top of the tower...
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