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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

Mathematics for Practical Men: Being a Common-place Book of Principles ...

Olinthus Gregory - Mathematics - 1834 - 472 pages
...wanting to ascertain the height of a tower standing on the top of an inaccessible hill, I :ook the angle of elevation of the top of the hill 40°, and...of the tower 51°, then measuring in a direct line ISO feet farther from the hill, I took in the same vertical plane the angle of elevation of the top...

Mathematical and Astronomical Tables: For the Use of Students in Mathematics ...

William Galbraith - Astronomy - 1834 - 428 pages
...horizontal plane, and wanting to know the height of a tower on the top of an inaccessible hill, I took the angle of elevation of the top of the hill 40°, and...of the tower 51° ; then measuring in a direct line 100 feet farther from the hill, I took in the same vertical plane the angle of elevation of the tower...

Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1836 - 359 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...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...

Elements of Surveying: Including a Description of the Instruments and the ...

Charles Davies - Navigation - 1837 - 336 pages
...ACE: it was found that = 6l-2 yards C^3=588 yaida 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. ^ 83 IJ99 4. Wanting to know the horizon- + tal distance between...

Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1837 - 372 pages
...feet, and also the contained angle ACB=55° 40': requi\ red the distance AB. * \ Ans. 592.907 feet. 6. Being on a horizontal plane, and wanting to ascertain...there were measured, the angle of elevation of the top oi the hill 40D, and of the top of the tower 51° : then measuring in a direct line 180 feet farther...

Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1838 - 386 pages
...standing on the top of an inaccessible hill, there were measured, the angle of elevation of the top ol the hill 40% and of the top of the tower 51° : then...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...

Elements of Surveying: With a Description of the Instruments and the ...

Charles Davies - Surveying - 1839 - 380 pages
...it was found that required the distance AB. &T2 yards 588 yards = 55° 40'; 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. ^ 83 998 feet 4. Wanting to know the horizontal distance between...

Elements of Surveying: With a Description of the Instruments and the ...

Charles Davies - Surveying - 1839 - 376 pages
...HEIGHTS AND DISTANCES. CZ? = 672 yards CA—588 yards required the distance AB. Ana. 599.967 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 feet. 4. Wanting to know the...