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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Σελίδα
... Hour Lines upon a Vertical ( commonly called Horizontal ) Plain . 396 Sect . 2. How to defcribe Hour - Lines upon an erect direct South or North Plain . 399 402 Sec . 3. To defcribe Hour - Lines upon an erect direct Eaft or Weft Plain ...
... Hour Lines upon a Vertical ( commonly called Horizontal ) Plain . 396 Sect . 2. How to defcribe Hour - Lines upon an erect direct South or North Plain . 399 402 Sec . 3. To defcribe Hour - Lines upon an erect direct Eaft or Weft Plain ...
Σελίδα 70
... time we fhall principally make ufe of ; in which , Hypothenu- fes are EC & BC EG & PH The Perpendicu- and the Sines the DE & AB lars are Bafes are DC & AC right Lines EI & BK . Now the Angle ACB at the Bafe is common to both Triangles ...
... time we fhall principally make ufe of ; in which , Hypothenu- fes are EC & BC EG & PH The Perpendicu- and the Sines the DE & AB lars are Bafes are DC & AC right Lines EI & BK . Now the Angle ACB at the Bafe is common to both Triangles ...
Σελίδα 295
... hours from a certain Cape to- wards B , bearing South , 18 Miles by Log . in ... hourly Rate . Again , As s . of ADB 22 ° 30 ′ 0.417160 Is to AB 18 Miles , the ... Line upon Gunter's Scale , look U 4 Or Chap . 4 . 295 Mercator's Sailing ...
... hours from a certain Cape to- wards B , bearing South , 18 Miles by Log . in ... hourly Rate . Again , As s . of ADB 22 ° 30 ′ 0.417160 Is to AB 18 Miles , the ... Line upon Gunter's Scale , look U 4 Or Chap . 4 . 295 Mercator's Sailing ...
Σελίδα 325
... Lines . IRST , with 60 ° of Chords draw the Circle two Diameters at right Angles ; divide each of the four Quadrants ... Hour of fix . The Meridians or Hour Circles are drawn by Prob . 5 . Chap . 10. of the firft Part . Thus the half ...
... Lines . IRST , with 60 ° of Chords draw the Circle two Diameters at right Angles ; divide each of the four Quadrants ... Hour of fix . The Meridians or Hour Circles are drawn by Prob . 5 . Chap . 10. of the firft Part . Thus the half ...
Σελίδα 327
... line from P to B , fo is B the Center of WPE , the Hour Circle of fix , whith is alfo the Equinoctial Colure . Then fet the half Tangent of 51 ° 30 ' from Z to Æ , fo fhall E be the Point in the Meridian thro which the Equinoctial muft ...
... line from P to B , fo is B the Center of WPE , the Hour Circle of fix , whith is alfo the Equinoctial Colure . Then fet the half Tangent of 51 ° 30 ' from Z to Æ , fo fhall E be the Point in the Meridian thro which the Equinoctial muft ...
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...