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trigonometry Line breaks: trig|onom¦etry
Pronunciation: /ˌtrɪɡəˈnɒmɪtri/

Definition of trigonometry in English:


[mass noun]
The branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles.
Example sentences
  • Geometry, and its branch trigonometry, was the mathematics Indian astronomers used most frequently.
  • Indians also added to our knowledge of even more complicated branches of mathematics such as trigonometry and calculus.
  • He studied a lot of mathematics in his own time including trigonometry, differential and integral calculus, and complex numbers long before he met these topics in his formal education.


Pronunciation: /ˌtrɪɡənəˈmɛtrɪk/
Example sentences
  • Curves (such as the trigonometric polynomials of elliptic Fourier analysis) may be fit to such an outline, and then compared through statistical analysis of their parameters.
  • The radian measure makes many trigonometric equations simpler and so it is the preferred unit of measuring angles in mathematics.
  • Vallée Poussin also worked on approximation to functions by algebraic and trigonometric polynomials from 1908 to 1918.
Pronunciation: /ˌtrɪɡənəˈmɛtrɪk(ə)l/
Example sentences
  • But there were algebraic, trigonometrical, and simple Pythagorian solutions offered, too
  • Astronomy, time-keeping and geography provided other motivations for geometrical and trigonometrical research.
  • Rather than using geometrical methods, as Ptolemy had done, al-Battani used trigonometrical methods which were an important advance.


Early 17th century: from modern Latin trigonometria (see trigon, -metry).

Words that rhyme with trigonometry

craniometry, geometry, micrometry, optometry, psychometry, pyrometry, sociometry
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