The MathematicianJ. Wilcox, 1751 - 399 σελίδες |
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Σελίδα 21
CONIC SECTIONS . Of the PARABOL A. The GENESIS . I F from a Point V , in any inde- finite right Line , there be taken VD = VK , and from the Point K , as a Center , with the Distance DG , you interfect CM drawn perpendicular to DG ...
CONIC SECTIONS . Of the PARABOL A. The GENESIS . I F from a Point V , in any inde- finite right Line , there be taken VD = VK , and from the Point K , as a Center , with the Distance DG , you interfect CM drawn perpendicular to DG ...
Σελίδα 22
... Point in the Curve , and parallel to the Axis , is called a Dia- meter , as CY ; and the Point in the Curve , from whence it is drawn , the Vertex of that Diameter . PROPOSITION I The Square of any Ordinate , is equal to the Rectangle ...
... Point in the Curve , and parallel to the Axis , is called a Dia- meter , as CY ; and the Point in the Curve , from whence it is drawn , the Vertex of that Diameter . PROPOSITION I The Square of any Ordinate , is equal to the Rectangle ...
Σελίδα 24
... Point D , in the Axe produced , a right Line be drawn interfecting the Curve in two Points C and I , and the Ordinates CP , IH , be drawn from the faid Interfections ; VD will be a mean Proportional between VP and VH . DEMON ...
... Point D , in the Axe produced , a right Line be drawn interfecting the Curve in two Points C and I , and the Ordinates CP , IH , be drawn from the faid Interfections ; VD will be a mean Proportional between VP and VH . DEMON ...
Σελίδα 25
... Point of Contact ; then the Abfciffa correfponding that Ordinate , will be equal to the Distance , in the Axe produced , from the Vertex of the Curve , to the Interfection of the Tangent ; that is , ĠV = VT . T > K F G r P DEMONSTRATION ...
... Point of Contact ; then the Abfciffa correfponding that Ordinate , will be equal to the Distance , in the Axe produced , from the Vertex of the Curve , to the Interfection of the Tangent ; that is , ĠV = VT . T > K F G r P DEMONSTRATION ...
Σελίδα 26
... Point of Contact , a right Line be drawn to the Focus , it will be equal to the Dif tance , in the Axe produced ... Point of the Con- tact , a Perpendicular be drawn , and produced to meet the Axe ; then the Distance in the Axe from that ...
... Point of Contact , a right Line be drawn to the Focus , it will be equal to the Dif tance , in the Axe produced ... Point of the Con- tact , a Perpendicular be drawn , and produced to meet the Axe ; then the Distance in the Axe from that ...
Συχνά εμφανιζόμενοι όροι και φράσεις
Abfciffa Abfcifs affigned Affymptotes alfo alſo Anfwered by John Arch Bafe Baſe becauſe bifecting Cafe Center Circle circumfcribing Cofine confequently Curve defcribed DEMONSTRATION determine Diameter Difference Diſtance draw Ellipfe equal Equation expreffed Expreffion faid fame fecond fhall fhew fimilar Triangles fince finite firft firſt flowing Quantities Fluent Fluxions fome fuch fuppofed Geometry given greateſt Hyperbola increaſe infcribed infinite infinite Series Interfection John Turner laft leffer lefs Magnitude Meaſure Method Method of Fluxions Motion muſt Number Ordinate paffing Parabola parallel Parallelogram Parameter perpendicular Pofition Point of Contact PROBLEM Progreffion Prop propofed Proportion Q. E. D. PROPOSITION Radius Reaſoning Rectangle refpectively reprefent right Angle right Line Semi-diameter Sides Sine Sir Ifaac Space Square Subtangent Tangent thefe theſe thofe thoſe thro tion tranfverfe Axe Trapezium ultimate Ratio Velocity Vertex whence whofe
Δημοφιλή αποσπάσματα
Σελίδα 157 - C' (89) (90) (91) (92) (93) 112. 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.
Σελίδα 193 - Velocity with which they increase and are generated; I sought a Method of determining Quantities from the Velocities of the Motions or Increments, with which they are generated; and calling these Velocities of the Motions or Increments Fluxions, and the generated Quantities Fluents, I fell by degrees upon the Method of Fluxions, which I have made use of here in the Quadrature of Curves, in the Years 1665 and 1666.
Σελίδα 6 - They found, that similar triangles are to each other in the duplicate ratio of their homologous sides; and, by resolving similar polygons into similar triangles, the same proposition was extended to these polygons also.
Σελίδα 13 - ... all their theorems of this kind. It is often said, that curve lines have been considered by them as polygons of an infinite number of sides. But this principle no where appears in their writings. We never find them resolving any figure, or solid, into infinitely small elements.
Σελίδα 57 - Whatfoever politive ideas we have in our minds of any fpace, duration, or number, let them be ever fo great, they are ftill finite ; but when we fuppofe an inexhauftible remainder, from which we remove all bounds, and wherein we allow the mind an endlefs...
Σελίδα 205 - ... time approach to each other within less than any given difference, become ultimately equal. If you deny it, let them be ultimately unequal, and let their ultimate difference be D, then they cannot approach nearer to equality than quantities having a difference D: which is against the hypothesis.
Σελίδα 193 - I consider mathematical quantities in this place not as consisting of very small parts, but as described by a continued motion. Lines are described, and therefore generated not by the apposition of parts, but by the continued motion of points ; superficies by the motion of lines ; solids by the motion of superficies ; angles by the rotation of the sides ; portions of time by a continual flux ; and so in other quantities. These geneses really take place in the nature of things, and are daily seen...
Σελίδα 65 - ... of the simple addition of rising Moments, or of the continual flux of one Moment, and for that reason ascribe only length to it, and determine its quantity by the length of the line passed over : As a line, I say, is looked upon to be the trace of a point moving forward, being in some sort divisible by a point, and may be divided by Motion one way, viz. as to length ; so Time may be conceived as the trace of a Moment continually flowing, having some kind of divisibility from an Instant, and from...
Σελίδα 192 - ... flowing quantities." For example: I don't here consider Mathematical Quantities as composed of Parts extremely small, but as generated by a continual motion. Lines are described, and by describing are generated, not by any apposition of Parts, but by a continual motion of Points. Surfaces are generated by the motion of Lines, Solids by the motion of Surfaces, Angles by the Rotation of their Legs, Time by a continual flux...
Σελίδα 6 - ... objections that have been made to it. But, before we proceed, it may be of use to consider the...