## A Course of Mathematics: For the Use of Academies as Well as Private Tuition : in Two Volumes, Volume 2W. E. Dean, 1831 |

### From inside the book

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**nearly**763 square miles . Ex . 16. Determine the solid angles of a regular pyramid with hexagonal base , the altitude of the pyramid being to each side of the base , as 2 to 1 . Ans . Planc angle between each two lateral faces 125 ° 22 ... Page 62

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**nearly**as circumstances will permit , be equilateral . For , if it were pos- sible to choose the stations in such manner , that each angle should be exactly 60 degrees ; then , the half number of triangles in the series , mul . tiplied ... Page 63

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**nearly**as may be , in the direction of the meridian , according Y E F I MM ' de N P X K H to the observations in art . 3. These triangles are really spherical or spheroidal triangles ; but as their curvature is extremely small , they ... Page 77

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**nearly**equal ; then , since the cosines of small angles vary extremely slowly , we may , without sensible error , take log sin A'CB 10+ log sin ACB - log cos ( h + h ' ) . Cor . 3. In this case the correction x = A'CB ' ACB , may be ... Page 81

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**nearly**; then will 90 ° —a ' = 17 ′′ 7 . Cor . 7. Retaining the same hypothesis of a == a = or < 1 ° , we have 902 , and ba . cot B bc B- -B ′ = = ... ( VIII . ) 8R " 8R ' VOL . II . 12 Also cc ' : - bc 8K " · ( GEODESIC OPERATIONS . 81.### Other editions - View all

### Common terms and phrases

abscissas altitude axis ball base beam becomes body centre of gravity chords circle consequently Corol cosine curve denote density descending determine diameter direction distance draw earth equa equal equation equilibrio EXAM expression feet find the fluent fluid fluxion force given plane ground line Hence horizontal plane hyperbola inches inclined plane intersection length logarithm measure motion multiplied nearly ordinates parabola parallel pendulum perpendicular pressure prob PROBLEM PROP proportional quantity radius ratio rectangle resistance right angles right line roots Scholium side sine solid angle space specific gravity spherical angle spherical excess spherical triangle square straight line supposed surface tangent theorem theref tion velocity vertex vertical plane vertical projections vibrations weight whole

### Popular passages

Page 459 - Or, by an. 249 of the same, the pressure is equal to the weight of a column of the fluid...

Page 66 - To prove that the exterior angle of a triangle is equal to the sum of the two interior opposite angles (see fig.

Page 195 - VI, its Corollaries and Scholium, for Constant Forces, are true in the Motions of. Bodies freely descending by their own Gravity ; namely, that the Velocities are as the Times, and the Spaces as the Squares of the Times, or as the Squares of the Velocities. FOR, since the force of gravity is uniform, and constantly the same, at all places near the earth's surface, or at nearly the same distance from the centre of the earth ; and since • this is the force by which bodies descend to the surface ;...

Page 239 - BPC) ; or, the pressure of a fluid on any surface is equal to the weight of a column of the fluid...

Page 289 - The workmen thought that substituting part silver was only a proper <perquisite; which taking air, Archimedes was appointed to examine it ; who, on putting...

Page 35 - Two planes are said to have the same or a like inclination to one another which two other planes have, when the said angles of inclination are equal to one another.

Page 75 - Let a, b, c, be the sides, and A, B, c, the angles of a spherical triangle, on the surface of a sphere whose radius is r ; then...

Page 385 - Multiply the number in the table of multiplicands, by the breadth and square of the depth, both in inches, and divide that product by the length, also, in inches; the quotient will be the weight in Jbs.t Example 1.

Page 244 - Weigh the denser body and the compound mass, separately, both in water and out of it ; then find how much each loses in water, by subtracting its weight in water from its weight in air ; and subtract the less of these remainders from the greater. Then...

Page 140 - Body is either Hard, Soft, or Elastic. A Hard Body is that whose parts do not yield to any stroke or percussion, but retains its figure unaltered. A Soft Body is that whose parts yield^to any stroke or impression, without restoring themselves again ; the figure of the body remaining altered.