| William Flower - 1768 - 228 sider
...point from the middle of the bafe. TbeoretQ VII. In any fpberic triangle it will be, as the cotangent **of half the fum of the angles, at ' the bafe is to...to the tangent of the angle which the perpendicular** makes with the line bifeftivg the vertical angle. NB Any three parts of any oblique angled fpberical... | |
| Euclid - 1776 - 264 sider
...cotangent of half thefum of the * angles at the bafe, is to the tangent of half their difference ; as **the tangent of half the vertical angle to the tangent of the angle** that the perpendicular makes tuith the line bifecling the vertical angle. Let BDC be the triangle,... | |
| Thomas Hodson - 1802
...from the middle of the bafe. Theorem VI. In any fpherical triangle ABC, (fig. i*,) As the cotangent **of half the fum of the angles at the bafe, is to the...which the perpendicular CD makes with the line CF,** bifcding the vertical The Solution of the Cafes of righl-angled fpfierical Triangles, (Fig. II.) \OTI.... | |
| Thomas Hodson - 1806
...angles at the bafe, is to the tangent of half their difference, fo is the tangent of half the vertii cal **angle, to the tangent of the angle which the perpendicular CD makes with the line CF,** bifefling the vertical angle. 4 77* The Solution of the Cafes of right-angled fpherical Triangles,... | |
| William Nicholson - 1821
...co-tangent of half the sum of the angles at the case is to the tangent of half their difference, so **is the tangent of half the vertical angle to the tangent...which the perpendicular CD makes with the line CF,** bisecting the vertical angle. The following propositions and remarks concerning spherical triangles... | |
| William Nicholson - 1821
...co-tangent of half the sum of the angles at the base is to the tangent of half their difference, so **is the tangent of half the vertical angle to the tangent...which the perpendicular CD makes with the line CF,** bisecting the vertical angle. The following propositions and remarks concerning spherical triangles... | |
| Enoch Lewis - 1844 - 228 sider
...cotangent of half the sum of the angles at the base is to the tangent of half their difference, so **is the tangent of half the vertical angle to the tangent of the angle** formed by the perpendicular and the arc bisecting the vertical angle. Let ABC be the triangle, CD the... | |
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