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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: With Applications in Mensuration - Page 209
by Charles Davies - 1886 - 324 pages
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Elements of Geometry and Trigonometry

Geometry - 1843 - 404 pages
...=672 feet, and also the contained angle ACB=55 40': required the distance AB. Ans. 592.967 feet. 6. Being on a horizontal plane, and wanting to ascertain...elevation of the top of the hill 40, and of the top of die tower 51 : then measuring in a direct line 180 feet farther from the hill, the angle of elevation...
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A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ...

Nathan Scholfield - Conic sections - 1845
...them and formulas p, Chap. Ill, find the angles of a triangle whose sides are 5, 6, and 7. Ex. 17. Being on a horizontal plane, and wanting to ascertain...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
...them and formulae $, Chap. Ill, find the angles of a triangle whose sides are 5, 6, and 7. Ex. 17. Being on a horizontal plane, and wanting to ascertain...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 plane (solid) geometry (Higher geometry) and trigonometry (and ...

Nathan Scholfield - 1845 - 896 pages
...them and formulas J3, Chap. Ill, find the angles of a triangle whose sides are 5, 6, and 7. Ex. 17. Being on a horizontal plane, and wanting to ascertain...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
...DISTANCES. :672 yards C.#=588 yards •aCB — 5Zia 40 ; required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain...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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Elements of Geometry and Trigonometry Translated from the French of A.M ...

Charles Davies - Trigonometry - 1849 - 384 pages
...required the distance AB. Ans. 592.967 feet. 6. Being on a horizontal plane, and wanting to ascertain >he height of a tower, standing on the top of an inaccessible...angle of elevation of the top of the tower was 33 45': required the height of the tower. Ans. 83.9983 feet. 7. Wanting to know the horizontal distance...
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Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1852 - 436 pages
...that, CB = 672 yards, CA = 588 yards, A OB = 55 40'; required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain...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
...it was found that, OB = 672 yards, CA =588 yards, required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain...angle of elevation of the top of the tower was 33 45' ; required the height of the tower. Ans. 83.998. 4. "Wanting to know the horizontal distance between...
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Elements of Geometry and Trigonometry from the Works of A.M. Legendre ...

Charles Davies - Geometry - 1854 - 436 pages
...it was found that, CB = 672 yards, CA = 588 yards, required the distance AB. Ans. 592.967 yards. 3. Being on a horizontal plane, and wanting to ascertain...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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