7 466
правак
<math>S_{AB}=\frac{\Delta X}{\cos \alpha_{AB}}=\frac{\Delta Y}{\sin \alpha_{AB}}=\Delta X \cdot \sec \alpha_{AB} = \Delta Y \cdot \mathrm{cosec}\, \alpha_{AB}</math>
<math>S_{AB}=\frac{\Delta X}{\cos r_{AB}}=\frac{\Delta Y}{\sin r_{AB}}=\Delta X \cdot \sec r_{AB} = \Delta Y \cdot \mathrm{cosec}\, r_{AB}</math>
[[Катэгорыя:Геадэзія]]
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правак