# Definition of trigonometry in English:

## trigonometry

Pronunciation: /ˌtriɡəˈnämətrē/

## 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.

## Derivatives

#### trigonometric

Pronunciation: /ˌtriɡ(ə)nəˈmetrik/
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.

#### trigonometrical

Pronunciation: /ˌtriɡ(ə)nəˈmetrək(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.

## Origin

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

## Words that rhyme with trigonometry

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

Syllabification: trig·o·nom·e·try

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## Related Words

### More words in this category

circum. construct dodecagon edge hyperboloid