Which mechanism enabled medieval Islamic scholars to accurately determine the Qibla direction using algebra and spherical trigonometry?

💡 Explanation

When determining the Qibla the stereographic projection, which preserves angles, created a 2D representation of the celestial sphere, allowing trigonometric calculations with algebraic formulas to determine direction. Therefore stereographic projection is key, rather than other surveying or calculation methods which could not transfer 3D coordinates.

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