Which navigational problem became solvable circa 1000 AD due to significant advances in algebra?

💡 Explanation

Calculating lunar position used algebra to resolve angular differences; the method of double angle formulas provided solutions where classical geometry alone failed, because algebraic manipulation allowed more precise angle calculation, therefore enabling better lunar positioning rather than relying primarily on observation.

• Which consequence results when excessive 'dip' exists when using a sextant at sea?
• Which consequence resulted when envoys representing the Byzantine Empire offered technological assistance to various Balkan tribes during the 7th century?
• Which consequence resulted from increased frictional losses during initial steamship voyages through narrow river channels?
• Which structural problem arose when Roman road builders laid paving stones directly over soft ground?
• Which defensive weakness arose in late-Roman castra when facing sapping tactics?
• Which structural failure was most common when constructing pre-Columbian agricultural terraces on steep Andean slopes?