| Colin Macfarquhar, George Gleig - Encyclopedias and dictionaries - 1797
...difference : and as the fum of the cpifines'ia to their difference, fo is the co-tangent of half the fum **of the arches to the tangent of half the difference of the fame arches.** THEOREM V. In any fpherical triangle ABC (fig. 9 and •< 10.) it will be, As the co-tangent of half... | |
| Thomas Hodson - Arithmetic - 1806 - 488 pages
...difference; and, As the fum of the cofines is to their ditference, fo is the cotangent of half the fum **of the arches to the tangent of half the difference of the** feme arches, Theorem V. In any fpherical triangles ABC (fig. la and i3), the proportion is, As the... | |
| William Nicholson - 1809 - 720 pages
...difference : and it the sum of tbcir co-siuc-s is to their difference, so is the co-tangent of half the **sum of the arches to the tangent of half the difference of the** same arches. In any spherical triangle A li С (fig. 27), it will be, as the cotangent of half the... | |
| William Nicholson - Natural history - 1821 - 356 pages
...difference : and as the sum of their co-sines a to their difference, so is the co-tangent of half the **sum of the arches to the tangent of half the difference of the** same arches. In any spherical triangle, ABC (fig. 27,) it will be, as the co-tangent of half the sum... | |
| William Nicholson - Natural history - 1821 - 356 pages
...difference : and as the sum of their co-sines is to their difference, so is the co-tangent of half the **sum of the arches to the tangent of half the difference of the** same arches. In any spherical triangle, ABC (fig. 27,) it will be, as the co-tangent of half the sum... | |
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