Definition of trigonometry in English:
trigonometry
Syllabification: trig·o·nom·e·tryPronunciation: /ˌtrigəˈnämitrē
/
noun
 The branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles.More 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
 More 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
 More example sentences
 But there were algebraic, trigonometrical, and simple Pythagorian solutions offered, too
 Astronomy, timekeeping and geography provided other motivations for geometrical and trigonometrical research.
 Rather than using geometrical methods, as Ptolemy had done, alBattani used trigonometrical methods which were an important advance.
Pronunciation: /nəˈmetrik/
adjective
Pronunciation: /nəˈmetrikəl/
adjective
More definitions of trigonometry
Definition of trigonometry in: The British & World English dictionary
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