Source: wikibot/ptolemy-s-table-of-chords
= Ptolemy's table of chords
{wiki=Ptolemy's_table_of_chords}
Ptolemy's table of chords is an ancient mathematical construct from Ptolemy's work in the realm of astronomy and trigonometry. In his work "Almagest" (or "Mathematics of the Stars"), Ptolemy compiled a table that lists the lengths of chords in a circle corresponding to various angles. This table served as an early form of trigonometric values before the formal development of trigonometry.