# History of trigonometry

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What exactly is Trigonometry? Where and when was it first used? How was it invented? A brief history of trigonometry and important figures who helped invent it. #history #trigonometry #hipparchus #ptolemy

The Mathematics of the Heavens and the Earth: The Early History of Trigonometry

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History of trigonometry (wiki) - equation for calculating sine. Sine function defines the relationship between the opposite side and the longest side of the triangle as a ratio.

History of Trigonometry and its Applications in different careers

Hipparchus is many times refered to as the father of trigonometry. He first used his trigonometric methods for astronomy. #hipparchus #trigonometry #history

The accomplishments of Ptolemy as a mathematician, astronomer, and geographer. His table of chords is one of the earliest surviving tables of a trigonometric function. #ptolemy #mathematician #trigonometry #history #almagest

Al-Biruni wrote over 100 treatises on astronomy, science, mathematics, geography, history, geodesy and philosophy. Only about twenty of these works now survive, and only about a dozen of these have been published. Al-Biruni's treatise entitled Maqalid 'ilm al-hay'a (Keys to the Science of Astronomy) ran to over one thousand pages and contained extensive developments in on trigonometry. Among many theorems, he produced a demonstration of the tangent formula, shown below.

The proof of the sum formula for sine using ptolemy's theorem. #trigonometry #proof #ptolemy #sine #cosine #sumdifference #almagest

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Funny Quizzes about any topic: Trigonometry, History of mathematics,...

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History of CC Algebra I Questions – by Christopher Desmond and the Nottingham Teachers | eMathInstruction

Theorems and proofs of how Ptolemy constructed his table of chords and how they related to modern day trigonometry #theorems #proofs #ptolemy #trigonometry #almagest

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