Which algebraic mechanism allowed 9th-century Islamic engineers to precisely determine qibla direction using astrolabes?

💡 Explanation

Islamic engineers utilized spherical trigonometry because it establishes spatial relationships, enabling conversion between celestial coordinates (altitude/azimuth) and Earth-based coordinates (latitude/longitude) for qibla calculation. Therefore spherical trigonometry is correct, rather than series, matrix, or boolean algebra, which are ill-suited for coordinate transformations.

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