Elements of Plane and Spherical Trigonometry: With Practical ApplicationsR. S. Davis, 1862 - 490 páginas |
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Página 56
... TANGENT to a circle is a straight line which , how far so ever produced , meets the circumference in but one point ; as the line CD . The point of meeting is called the POINT OF CONTACT ; as the point M. 162. Two circumferences TOUCH ...
... TANGENT to a circle is a straight line which , how far so ever produced , meets the circumference in but one point ; as the line CD . The point of meeting is called the POINT OF CONTACT ; as the point M. 162. Two circumferences TOUCH ...
Página 57
... tangents to the circumference ; as the polygon ABCDEF . F B A 168. The circle is then said to be INSCRIBED in the polygon . PROPOSITION I.THEOREM . 169. Every diameter divides the circle and its circum- ference each into two equal parts ...
... tangents to the circumference ; as the polygon ABCDEF . F B A 168. The circle is then said to be INSCRIBED in the polygon . PROPOSITION I.THEOREM . 169. Every diameter divides the circle and its circum- ference each into two equal parts ...
Página 64
... tangent to the circle . Let the straight line BD be per- pendicular to the radius CA at its B- termination A : then will it be a tangent to the circle . Draw from the centre C to BD any other straight line , as CE . Then , since CA is ...
... tangent to the circle . Let the straight line BD be per- pendicular to the radius CA at its B- termination A : then will it be a tangent to the circle . Draw from the centre C to BD any other straight line , as CE . Then , since CA is ...
Página 65
... tangent ( Art . 161 ) . PROPOSITION XI . — THEOREM . 185. If a line is a tangent to a circumference , the ra- dius drawn to the point of contact with it is perpendicular to the tangent . Let BD be a tangent to the cir- cumference , at ...
... tangent ( Art . 161 ) . PROPOSITION XI . — THEOREM . 185. If a line is a tangent to a circumference , the ra- dius drawn to the point of contact with it is perpendicular to the tangent . Let BD be a tangent to the cir- cumference , at ...
Página 66
... tangent DE A ( Prop . X. ) , and also to its parallel AB ( Prop . XXII . Cor . , Bk . I. ) . But , since CH is ... tangents , as DE , IL . Draw the secant AB parallel to either of the tangents , and it will be parallel to the other ...
... tangent DE A ( Prop . X. ) , and also to its parallel AB ( Prop . XXII . Cor . , Bk . I. ) . But , since CH is ... tangents , as DE , IL . Draw the secant AB parallel to either of the tangents , and it will be parallel to the other ...
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Términos y frases comunes
A B C ABCD adjacent angles altitude angle ACB angle equal base bisect centre chord circle circumference circumscribed cone convex surface cosec Cosine Cotang cylinder diagonal diameter distance divided drawn equal Prop equilateral triangle equivalent exterior angle feet formed frustum gles greater half the sum hence homologous hypothenuse inches included angle inscribed interior angles isosceles less Let ABC line A B logarithmic sine measured by half multiplied number of sides parallel parallelogram parallelopipedon pendicular perimeter perpendicular polyedron prism PROBLEM PROPOSITION pyramid quadrantal radii radius ratio rectangle regular polygon Required the area right angles right-angled triangle rods Scholium secant segment side A B similar slant height solve the triangle sphere spherical polygon spherical triangle Tang tangent THEOREM triangle ABC triangle equal trigonometric functions vertex
Pasajes populares
Página 28 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Página 37 - 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.
Página 79 - Two rectangles having equal altitudes are to each other as their bases.
Página 251 - The convex surface of the cylinder is equal to the circumference of its base multiplied by its altitude (Prop.
Página 52 - If any number of quantities are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let a : b = c : d = e :f Now ab = ab (1) and by Theorem I.
Página 35 - If any side of a triangle be produced, the exterior angle is equal to the sum of the two interior and opposite angles.
Página 168 - If a straight line is perpendicular to each of two straight lines at their point of intersection, it is perpendicular to the plane of those lines.
Página 303 - Equal triangles upon the same base, and upon the same side of it, are between the same parallels.
Página 4 - The logarithm of any POWER of a number is equal to the product of the logarithm of the number by the exponent of the power. For let m be any number, and take the equation (Art. 9) M=a*, then, raising both sides to the wth power, we have Mm = (a")m = a"" . Therefore, log (M m) = xm = (log M) X »»12.
Página 102 - Two triangles, which have an angle of the one equal to an angle of the other, and the sides containing.