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- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 authorLink "Carl Benjamin Boyer".
- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 chapter "Greek Trigonometry and Mensuration".
- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 first "Carl Benjamin".
- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 isCitedBy History_of_trigonometry.
- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 last "Boyer".
- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 page "162".
- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 quote "For some two and a half centuries, from Hippocrates to Eratosthenes, Greek mathematicians had studied relationships between lines and circles and had applied these in a variety of astronomical problems, but no systematic trigonometry had resulted. Then, presumably during the second half of the 2nd century BC, the first trigonometric table apparently was compiled by the astronomer Hipparchus of Nicaea , who thus earned the right to be known as "the father of trigonometry". Aristarchus had known that in a given circle the ratio of arc to chord decreases as the arc decreases from 180° to 0°, tending toward a limit of 1. However, it appears that not until Hipparchus undertook the task had anyone tabulated corresponding values of arc and chord for a whole series of angles.".
- 22bbd5e2e8316f366c1aec084c63a3f0b5e094205d10e4f1a45d6e71e4bc6b97 year "1991".