 These formulae will be readily seen from the definitions (Tr. 13.), and from what has just been stated, to be identical relations existing among the ratios of the sides of the pyramid PQOR. Each of the first three has another like it, similarly deduced...  Elements of Spherical Trigonometry - Pàgina 5per Augustus De Morgan - 1833 - 32 pàginesVisualització completa - Sobre aquest llibre
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...A RQ RQ RP ,...-, . tan. a ~ tan. A sin. 6 cos. с = cos. 6 cos. a RO~1TP ' OP OP OR OQ " OR ' OQ' These formulae will be readily seen from the definitions...we shall range them as follows; in which a side and its opposite angle are in the same type, whether Roman or Italic, in the same formnlie. We add two... | |
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