{ "id": "ddd82d1bc2831076899a5e6e0ddfac6861a16c5bd4be871e5a8482b6efa74f78", "pubkey": "d28413712171c33e117d4bd0930ac05b2c51b30eb3021ef8d4f1233f02c90a2b", "created_at": 1745949696, "kind": 9802, "tags": [ [ "r", "https://www.sciencedirect.com/science/article/pii/S0315086017300691" ], [ "textquoteselector", "-", "om a proto-trigonometric table.•", "AbstractWe trace the origins of " ], [ "textpositionselector", "23447", "23690" ], [ "rangeselector", "/div[3]/div[1]/div[1]/div[1]/div[1]/div[3]/div[2]/article[1]/div[6]/div[1]/div[1]/div[1]/ul[1]/li[2]/span[2]/div[1]", "/div[3]/div[1]/div[1]/div[1]/div[1]/div[3]/div[2]/article[1]/div[6]/div[1]/div[1]/div[1]/ul[1]/li[3]/span[2]/div[1]", "0", "114" ] ], "content": "The Babylonians discovered exact sexagesimal trigonometry at least 1500 years before the ancient Greeks discovered trigonometry.•Babylonian exact sexagesimal trigonometry uses exact ratios and square ratios instead of approximation and angles.", "sig": "a17c80ac372f849d9a9eabe9c04930889f5d65bc3c531babd516557becbc0b7c546f75239792ec158d0aff721818cf9de701be9717352d710c1fef6a20fe6333" }