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History of Trigonometry

Trigonometry

A collection of historical facts and discoveries in the field of trigonometry.

history mathematics geometry

8 Questions Medium Ages 12+ Jul 30, 2026

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About this Study Set

This study set covers Trigonometry through 8 practice questions. A collection of historical facts and discoveries in the field of trigonometry. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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1 Which ancient Greek mathematician is widely considered the 'father of trigonometry' for creating the first known table of chords?

A Euclid
B Hipparchus
C Archimedes
D Pythagoras

2 The word 'sine' originates from a mistranslation of the Sanskrit word 'jya', which was first used in the mathematical works of which Indian astronomer?

A Aryabhata
B Brahmagupta
C Bhaskara II
D Varahamihira

3 Who was the first mathematician to treat trigonometry as a distinct branch of mathematics, separate from astronomy, in his 1595 work 'Trigonometria'?

A Leonhard Euler
B Isaac Newton
C Bartholomaeus Pitiscus
D Johannes Kepler

4 The first known use of the secant and cosecant functions in a trigonometric table can be attributed to which civilization?

A Ancient Egyptians
B Islamic Golden Age mathematicians
C Ancient Mayans
D Han Dynasty Chinese

5 Which 16th-century mathematician introduced the use of the decimal system for trigonometric tables, greatly increasing their precision?

A Georg Joachim Rheticus
B Regiomontanus
C François Viète
D John Napier

6 Who is credited with being the first to define the six trigonometric functions as ratios of sides of a right-angled triangle rather than as lines in a circle?

A Thomas Fincke
B Georg Joachim Rheticus
C Leonhard Euler
D Claudius Ptolemy

7 In his work 'De Triangulis omnimodis', which mathematician provided the first systematic treatment of plane and spherical trigonometry in Europe?

A Regiomontanus
B Gerolamo Cardano
C Nicolaus Copernicus
D Simon Stevin

8 Which mathematician was the first to use the modern abbreviations 'sin', 'cos', and 'tan' in his published writings?

A Carl Friedrich Gauss
B Leonhard Euler
C Thomas Hobbes
D Blaise Pascal

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