Problems and ExamplesDeighton, Bell and Company, 1862 - 141 pages |
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Page 56
... feet , runs at the foot of a tower CB , which subtends an angle BAC of 25 ° 10 ' at the edge of the bank . Required the height of the tower . 2. The angles of elevation of a balloon were taken at the same time by three observers ...
... feet , runs at the foot of a tower CB , which subtends an angle BAC of 25 ° 10 ' at the edge of the bank . Required the height of the tower . 2. The angles of elevation of a balloon were taken at the same time by three observers ...
Page 57
... feet , and observes the angle BDC ; he then advances to E , b feet further , and observes that the angle BEC = the supple- ment of BDC . From these observations find the sides of the triangle . 8. A person walking from C to D on the ...
... feet , and observes the angle BDC ; he then advances to E , b feet further , and observes that the angle BEC = the supple- ment of BDC . From these observations find the sides of the triangle . 8. A person walking from C to D on the ...
Page 58
... feet , the angles of depression of the top and bottom of a column , standing on the same horizontal plane with the ... feet high , placed on the top of a tower , subtends an angle the tangent of which is 015 , at a place the horizontal ...
... feet , the angles of depression of the top and bottom of a column , standing on the same horizontal plane with the ... feet high , placed on the top of a tower , subtends an angle the tangent of which is 015 , at a place the horizontal ...
Page 62
... feet high is just seen by a man six feet in height , at a distance of 10 miles ; find the earth's radius . 29. A ship , the height to the summit of the top mast of which from the water is 90 feet , is sailing directly towards an ...
... feet high is just seen by a man six feet in height , at a distance of 10 miles ; find the earth's radius . 29. A ship , the height to the summit of the top mast of which from the water is 90 feet , is sailing directly towards an ...
Page 78
... feet long , balances about a point at one- third of its length from the thicker end : but when a weight of 10 lbs . is suspended from the smaller end , the fulcrum must be moved 2 feet towards it in order to maintain equilibrium . Find ...
... feet long , balances about a point at one- third of its length from the thicker end : but when a weight of 10 lbs . is suspended from the smaller end , the fulcrum must be moved 2 feet towards it in order to maintain equilibrium . Find ...
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2nd Edition 3rd Edition 4th Edition acceleration tending arithmetical arithmetical mean arithmetical series bisected centre of gravity chord circle concave cone Conic Sections conjugate convex lens Crown 8vo cylinder determine diameter directrix distance drawn Elementary ellipse English equal equation extremity F. A. Paley Fcap feet Find the number find the value fluid focal length foci focus geometrical progression given point given weight harmonic mean horizontal inches incident inclined plane inscribed intersection Latin latus rectum locus luminous point middle point mirror Multiply parabola parallel particle describes passing perpendicular position Post 8vo pressure prism projected prove pully quantity radii radius ratio reflected refracting respectively shew sides sin² specific gravity sphere spherical square straight line string subtends surface tangent tower velocity vertex vertical
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