A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration, Containing Many Valuable Discoveries and Impovements in Mathematical Science ...: Designed as a Text Book for Collegiate and Academic Instruction, and as a Practical Compendium on MensurationCollins brothers & Company, 1845 - Conic sections |
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Page 7
... through the centre ; a small circle , one which does not pass through the centre . 4. A plane is tangent to a sphere , when their surfaces have but one point in common . 5. The pole of a circle of a sphere is SPHERICAL GEOMETRY.
... through the centre ; a small circle , one which does not pass through the centre . 4. A plane is tangent to a sphere , when their surfaces have but one point in common . 5. The pole of a circle of a sphere is SPHERICAL GEOMETRY.
Page 8
... tangent to the sphere ; in which case , the zone has only a single base . 13. A spherical segment is the portion of the solid sphere included between two parallel planes which form its bases . One of these planes may be tangent to the ...
... tangent to the sphere ; in which case , the zone has only a single base . 13. A spherical segment is the portion of the solid sphere included between two parallel planes which form its bases . One of these planes may be tangent to the ...
Page 14
... tangents AF , AG , and be measured by the arc DE , described about A as a pole . For the tangent AF , drawn in the plane of the arc AB , is perpendicular to the ra- dius AO ; and the tangent AG , drawn in the plane of the arc AC , is ...
... tangents AF , AG , and be measured by the arc DE , described about A as a pole . For the tangent AF , drawn in the plane of the arc AB , is perpendicular to the ra- dius AO ; and the tangent AG , drawn in the plane of the arc AC , is ...
Page 30
... tangent to the circumference at A. Produce CP to meet AT in T. T P B E C C 4. Then the ratio of PS to the radius CA of the circle , is called the sine of the angle PCA . Or , PS = sin . 0 . CA 5. The ratio of AT to the radius CA of the ...
... tangent to the circumference at A. Produce CP to meet AT in T. T P B E C C 4. Then the ratio of PS to the radius CA of the circle , is called the sine of the angle PCA . Or , PS = sin . 0 . CA 5. The ratio of AT to the radius CA of the ...
Page 31
... tangent of the complement of any given angle , is called the cotangent of that angle . Thus , tan . ( 90 ° -4 ) = cot . & , hence cot . ( 90 ° -4 ) = tan . 10. The secant of the complement of any given angle , is called the cosecant of ...
... tangent of the complement of any given angle , is called the cotangent of that angle . Thus , tan . ( 90 ° -4 ) = cot . & , hence cot . ( 90 ° -4 ) = tan . 10. The secant of the complement of any given angle , is called the cosecant of ...
Other editions - View all
A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ... Nathan Scholfield No preview available - 2018 |
A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ... Nathan Scholfield No preview available - 2018 |
A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ... Nathan Scholfield No preview available - 2018 |
Common terms and phrases
abscissa altitude arithmetical progression axes base bisected chord circle circular circular segment circumference cone conjugate axis construction convex surface corresponding cosec cosine cylinder described diameter distance divided draw drawn ellipse equal to half equation expression feet find the solidity formed formula Geom geometrical given height hence hyperbola inches infinite series latus rectum length logarithm major axis middle frustum minor axis multiplied ordinate parabola paraboloid parallel parallelogram perpendicular plane portion prism PROBLEM Prop PROPOSITION pyramid quadrant quantity radii radius ratio rectangle revoloidal surface right angles Scholium sector segment sides similar similar triangles sine specific gravity sphere spherical triangle spheroid spindle square straight line tangent THEOREM tion transverse axis Trigonometry ungula versed sine vertex vertical virtual centre zone
Popular passages
Page 44 - Prove that parallelograms on the same base and between the same parallels are equal in area.
Page 197 - ... is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16. And this point is called the centre of the circle.
Page 81 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 219 - To find the solidity of a hyperbolic conoid, or otherwise called a hyperboloid. RULE. To the square of the radius of the base, add the square of the diameter...
Page 68 - In the same way it may be proved that a : b : : sin. A : sin. B, and these two proportions may be written a : 6 : c : : sin. A : sin. B : sin. C. THEOREM III. t8. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference. By Theorem II. we have a : b : : sin. A : sin. B.
Page 14 - ... this point of intersection, as a pole, and limited by the sides, produced if necessary. Let the angle BAC be formed by the two arcs AB, AC ; then it will be equal to the angle FAG formed by the tangents AF, AG, and be measured by the arc DE, described about A as a pole.
Page 27 - The circumference of every circle is supposed to be divided into 360 equal parts...
Page 36 - The solidity of a cylinder is equal to the area of its base multiplied by its altitude.
Page 7 - The radius of a sphere is a straight line, drawn from the centre to any point of the surface ; the diameter, or axis, is a line passing through this centre, and terminated on both sides by the surface.