A Course of Mathematics: In Three Volumes : Composed for the Use of the Royal Military Academy ...F.C. & J. Rivington, 1811 |
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Αποτελέσματα 1 - 5 από τα 87.
Σελίδα 10
... parallel to AE . E C A. GF B Then BE is the sum of the two given sides AC , CB , or of EC , CB ; and BD is the difference of the same two given sides AC , AC , BC , or of CD , CB . 10 PLANE TRIGONOMERY . ᄒᄒ오 seremoonsd sdt.
... parallel to AE . E C A. GF B Then BE is the sum of the two given sides AC , CB , or of EC , CB ; and BD is the difference of the same two given sides AC , AC , BC , or of CD , CB . 10 PLANE TRIGONOMERY . ᄒᄒ오 seremoonsd sdt.
Σελίδα 11
... parallel to AE , is also per- pendicular to AD : consequently AE is the tangent of CDA the half sum , and DF the tangent of DAB the half difference of the angles , to the same radius AD , by the definition of a tan gent . But the ...
... parallel to AE , is also per- pendicular to AD : consequently AE is the tangent of CDA the half sum , and DF the tangent of DAB the half difference of the angles , to the same radius AD , by the definition of a tan gent . But the ...
Σελίδα 15
... parallel to вс . Then it is evident , from the definitions , that DF is the tangent , and AF the secant of the arc DE , or of the angle a which is measured by that arc , to the radius AD . Then , because of the parallels BC , DF , it ...
... parallel to вс . Then it is evident , from the definitions , that DF is the tangent , and AF the secant of the arc DE , or of the angle a which is measured by that arc , to the radius AD . Then , because of the parallels BC , DF , it ...
Σελίδα 29
... parallels AE , BD , meeting the two sides AC , CB , produced , in D and E , and making CD = CB , and CECA . Also draw CFG bi- C L D E B H secting DB and AE perpendicu- larly in Fand G ; and FHI pa- rallel to the side AB , meeting AC in ...
... parallels AE , BD , meeting the two sides AC , CB , produced , in D and E , and making CD = CB , and CECA . Also draw CFG bi- C L D E B H secting DB and AE perpendicu- larly in Fand G ; and FHI pa- rallel to the side AB , meeting AC in ...
Σελίδα 30
... parallel sides ; then multiply their sum by the perpendicular breadth , or the distance between them ; and take half the product for the area . By Geom . theor . 29 . Ex . 1. In a trapezoid , the parallel sides are 750 and 1225 , and ...
... parallel sides ; then multiply their sum by the perpendicular breadth , or the distance between them ; and take half the product for the area . By Geom . theor . 29 . Ex . 1. In a trapezoid , the parallel sides are 750 and 1225 , and ...
Συχνά εμφανιζόμενοι όροι και φράσεις
ab² absciss altitude axis ball base beam body breadth CA² CD² centre of gravity circle circular segment circumference column cone Corol Cosine Cotang cube cubic curve cylinder DE² denote density descending diameter direction distance divided draw drawn elastic elevation ellipse equal equilibrio EXAM field-book figure find the area find the fluent fluid force frustum half Hence horizontal hyperbola inclined plane length lever measure motion move multiply ordinate parabola parallel parallelogram pendulum perp perpendicular pressure PROBLEM prop proportional PROPOSITION quantity QUEST radius ratio rectangle right angles rule SCHOLIUM secant segment side similar triangles sine solid space specific gravity square station surface Tang tangent theodolite theor THEOREM theref trapezium triangle velocity vibrations weight whole yards
Δημοφιλή αποσπάσματα
Σελίδα 52 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Σελίδα 1 - Geom.) is an arc of any circle contained between the two lines which form that angle, the angular point being the centre ; and it is estimated by the number of degrees contained in that arc.
Σελίδα 77 - A diameter is any right line, as AB or DE, drawn through the centre, and terminated on each side by the curve ; and the extremities of the diameter, or its intersections with the curve, are its vertices. Hence all the diameters of a parabola are parallel to the axi?, and infinite in length.
Σελίδα 23 - 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 line 180 feet farther from the hill, the angle of elevation of the top of the tower was 33° 45' ; required the height of the tower.
Σελίδα 243 - May-pole, whose top was broken off" by a blast of wind, struck the ground at the distance of 15 feet from the foot of the pole ; what was the height of the whole May-pole, supposing the length of the broken piece to be 39 feet ?
Σελίδα 248 - Then say, As the weight lost in water, Is to the whole weight> So is the specific gravity of water, To the specific gravity of the body.
Σελίδα 261 - It is determined, we find, as a certain fraction of the length of a pendulum vibrating seconds in the latitude of London.
Σελίδα 27 - To find the area of a parallelogram, the length being 12-25, and height 8-5. 12-25 length 8'5 breadth 6125 9800 104-125 area . Ex. 2. To find the area of a square, whose side is 35'25 chains. Ans. 124 acres, 1 rood, 1 perch.
Σελίδα 72 - ARTIFICERS' WORK. ARTIFICERS compute the contents of their works by several different measures. As, Glazing and masonry, by the foot ; Painting, plastering, paving, &c, by the yard, of 9 square feet : Flooring, partitioning, roofing, tiling, &c, by the square of 100 - square feet : And brickwork...
Σελίδα 72 - ... the whole length of the upper part of the hand-rail, and girt over its end till it meet the top of the...