Q:
# Who is the father of trigonometry?

**Many historians refer to Hipparchus as the father of trigonometry, according to the New Mexico Museum of Space History.** Hipparchus was born in about 190 B.C., and he spent most of his life in Rhodes, Greece.

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Hipparchus developed a table of chords and used his trigonometric methods to calculate eclipses of the sun and moon. He also created the first listing of stars, dividing them into classes of brightness, a revised system that is still used by modern astronomers. Hipparchus also was the first individual to define a circle as 360 degrees. Much of his life's work centered around trying to accurately determine the length of a year.

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