Babylonian Tablet Plimpton 322: 3700-Year-Old Trigonometry Predates Greeks — E8 Intelligence Research

FINDING: Plimpton 322 is a 3700-year-old Babylonian clay tablet containing a precise trigonometric table based on Pythagorean triples, predating Greek trigonometry by over 1000 years and using a base-60 sexagesimal system. MATH: The tablet lists 15 rows of Pythagorean triples (a, b, c) satisfying a² + b² = c², with ratios b²/(c² - b²) or similar normalized values. Key constants: base-60 (sexagesimal) place-value notation; ratios derived from triples approximate 1.618 (golden ratio) in some rows. No explicit equations survive, but the triples are generated by a method equivalent to: a = p² - q², b = 2pq, c = p² + q² for integers p, q. CONNECTION: The triples exhibit ratios near 0.618 (1/φ) and 1.618 (φ) in side lengths, linking to geometric harmony. The base-60 system aligns with 60° angles in equilateral triangles and 360° circles, reflecting crystallographic symmetry (hexagonal close-packing, 6-fold rotational symmetry). The normalized ratios (e.g., b²/(c² - b²)) correspond to tange Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com