The Doctrine of Plain and Spherical Trigonometry: With Its Application and Use in the Following Parts of Mathematicks : Viz. I. Navigation in All Its Kinds ; as Plain Sailing, Mercator's Sailing, Middle Latitude, and Parallel Sailing, II. Astronomy, Wherein All the Problems Relation to the Doctrine of the Sphere are Solved, III. Projection of the Sphere in Plano, IV. Geography, V. Fortification, VI. Mensuration of Heights and Distances, Both Accessible and Inaccessible, VII. Dialling, Arithmetical and Intrumental, on All Sorts of PlanesJ. Darby, 1725 - 479 σελίδες |
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Αποτελέσματα 1 - 5 από τα 55.
Σελίδα 53
... Ships at Sea reprefented by A and B , and each of them makes Obfervation to the faid Ports , and finds the Angles CAD 62 ° 00 ' and CAB 24 ° 00 ' , and the Angles CBD 81 ° 00 ′ and DBA 48 ° 00 ' . To find the Distance of each Ship from ...
... Ships at Sea reprefented by A and B , and each of them makes Obfervation to the faid Ports , and finds the Angles CAD 62 ° 00 ' and CAB 24 ° 00 ' , and the Angles CBD 81 ° 00 ′ and DBA 48 ° 00 ' . To find the Distance of each Ship from ...
Σελίδα 56
... Ship at D discovers , and is defirous to know how far she is diftant from each of them ; in order thereunto she makes Obfer- vation , and finds the Angle that A and C make with D to be 25 ° 00 ' , and the Angle that A and B make with D ...
... Ship at D discovers , and is defirous to know how far she is diftant from each of them ; in order thereunto she makes Obfer- vation , and finds the Angle that A and C make with D to be 25 ° 00 ' , and the Angle that A and B make with D ...
Σελίδα 60
... Ship at D , 1.2131719 to the Port B is 9.471109- to the Port A is 16.33698 to the Port & is 16.84855 This Problem may be varied , fo that Angle A , may be turn'd towards D , lowing Scheme . 7.2 12 D E B iles the Port , or as in the fol ...
... Ship at D , 1.2131719 to the Port B is 9.471109- to the Port A is 16.33698 to the Port & is 16.84855 This Problem may be varied , fo that Angle A , may be turn'd towards D , lowing Scheme . 7.2 12 D E B iles the Port , or as in the fol ...
Σελίδα 230
... Ships at Sea , or the like and to make a Draught of the fame . Suppofe that A , B , C , D , E , F , and G , were a Squa- dron of Ships lying at an Anchor , and you being on Shore , were defirous to take their Distances and to make a ...
... Ships at Sea , or the like and to make a Draught of the fame . Suppofe that A , B , C , D , E , F , and G , were a Squa- dron of Ships lying at an Anchor , and you being on Shore , were defirous to take their Distances and to make a ...
Σελίδα 231
... Ship A , and note what De- grees of the Inftrument the Index cuts , which fup- pofe 60 deg . which note down ; then turn the Index about till thro the Sights you fee the Ship at B , and mark what Degrees are cut by the Index , as 74 ...
... Ship A , and note what De- grees of the Inftrument the Index cuts , which fup- pofe 60 deg . which note down ; then turn the Index about till thro the Sights you fee the Ship at B , and mark what Degrees are cut by the Index , as 74 ...
Συχνά εμφανιζόμενοι όροι και φράσεις
acute againſt alfo Altitude Arch Bafe Baſe becauſe Cafe Center Co-fine Comp Compaffes Compl Courfe Courſe Declination defcribe Departure Dial Diff Difference of Latitude Difference of Longitude Diſtance run Eaft Ecliptick equal Equinoctial extent will reach fame fe.c fecond fide find the Angle firft firſt flanking Angle fubtract half Sum half Tangent half the Angle half the Difference half the Sum Hour Hour-Lines Hypothenufe Hypothenufe BC Interfection lay a Ruler leffer lefs Line of Chords Line of Numbers meaſure Meridian muſt North North Plain Obfervation oblique angled oblique Circle obtufe Perpendicular Plain Triangles Points Pole primitive Circle Proportion Quadrant Radius reclining Plain right Afcenfion right Angles right Line Scale Secant SECT Ship Side BC Sliding Rule South Spherical Triangles Stile Stile's height Sub-ftile Sun's theſe thofe thro Triangle ABC verfed Sine Weft whofe Complement
Δημοφιλή αποσπάσματα
Σελίδα 38 - 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 124 - As the cosine of half the sum of the two sides is to the cosine of half their difference, so is the cotangent of half the contained angle to the tangent of half the sum of the other two angles.
Σελίδα 37 - FG 5 that is in Words, half the Sum of the Legs, Is to half their Difference, As the Tangent of half the Sum of the oppofite Angles, Is to the Tangent of half their Difference : But Wholes are as their Halves ; wherefore the Sum...
Σελίδα 36 - IN a plain triangle, the fum of any two fides is to their difference, as the tangent of half the fum of the angles at the bafe, to the tangent of half their difference.
Σελίδα 87 - ... to make the heart of a spectator ache, who knows the effect and the absurdity of it, to see five horses at length drawing a plough, and that perhaps upon a rich loam, where the force required is not more than 3 cwt. He cannot but think that in such cases the first horse draws the second, the second the third, the third the fourth, the fourth the fifth, and the fifth the plough, and that in fact the principal part of the draught lies upon the first horse...
Σελίδα 119 - TWo fides and an angle oppofite to one of them being given, To find the third fide and either of the other angles.
Σελίδα 38 - FG ; that is in Words, half the Sum of the Legs is to half their Difference, as the Tangent of half the Sum of the oppofite Angles is to the Tangent of half their Difference : But Wholes are as their Halves ; wherefore the Sum of the Legs is to their Difference, as the Tangent of half the Sum of the Angles oppofice is to the Tangent of half their Difference. j£. ED Axiom IV. -4. The Bale, or greateu Side of any $£• Plane Triangle is to the Sum of fs...