Which limitation constrained early medieval Islamic astronomers' geocentric astronomical calculations before accurate trigonometric functions?

💡 Explanation

Before accurate trigonometric functions, astronomers relied on iterative geometric approximations for angle calculations, which introduced small errors that compounded over multiple steps due to round-off propagation. Therefore cumulative angular error increased, rather than quantization which is related to instrument scales, or subjective and atmospheric limitations which are observational in nature.

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