 | Samuel Heynes - Electronic books - 1701 - 334 pages
...Axioms, or hy Rules deduced from them.' . . .- Л 1. . . ; ".—. ;.. t .'..V.-: ..:.-<.' .. RU LE, L,,. The Co-fines of the Angles at the Bafe, are proportional to the Sines of the Angles at-the Vertex. Note, that BA, DA aretheBafes of the Right.angled Triangles BPA, DP A. The Angles B,... | |
 | Samuel Heynes - Trigonometry - 1716 - 180 pages
...folved ( being thus prepared ) by the 2 firft Axioms, or by Rules deduced from them, RULE I, TheCorfjnss of the Angles at the Bafe, are proportional to the Sines of the Angles at the Vertex. Note, That BA, DA are the Bafes of the Right-angled Triangles BPA, DP A. The Angles B, and D are the... | |
 | Philip Ronayne - Algebra - 1717 - 478 pages
...prepat'd) by the two firft Axioms, or by Rules deduc'd from them. . .•, .;, .«".,-rt •; RULÇ I. The Co-fines of the Angles at the Bafe are proportional to the Sines (if the Angles at the Vertex. Nate, That BA and DA are the Bafesof the l_d Triangles BPA, DPA ; the... | |
 | Robert Simson - Trigonometry - 1781 - 534 pages
...fpherical triangles, having drawn a perpendicular arch from any of the angles upon the oppofite fide, the co-fines of the angles at the bafe are proportional to the fines of theverticle angles. Let BCD be a triangle, and the arch CA perpendicular to the bafe BD ;... | |
 | Robert Simson - Trigonometry - 1804 - 530 pages
...fpherical triangles, having drawn a perpendicular arch from any of the angles upon the oppofite fide, the co-fines of the angles at the bafe are proportional to the fines of the vertical angles. Let BCD be a triangle, and the arch CA perpendicular to the bafe BD ;... | |
 | John Playfair, Euclid - Circle-squaring - 1804 - 468 pages
...fpherical triangles, a perpendicular arch being drawn from any of the angles upon the oppofite fide, the co-fines of the angles at the bafe are proportional to the fines of the fegments of the vertical angle. Let ABC be a triangle, and the arch CD perpendicular to... | |
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BD ; the co-fine of the angle B will be to the co-fine of the angle D, as the fine of the angle BCA to the fine of the angle DCA. For by 22. the co-fine of the angle B is to the fine of the angle... 