The Collaborative International Dictionary
Trigonometric \Trig`o*no*met"ric\, Trigonometrical
\Trig`o*no*met"ric*al\, [Cf. F. trigonom['e]trique.]
Of or pertaining to trigonometry; performed by the rules of
trigonometry.
[1913 Webster]
-- Trig`o*no*met"ric*al*ly, adv.
Trigonometrical curve, a curve one of whose co["o]rdinates is a trigonometric function of the other.
Trigonometrical function. See under Function.
Trigonometrical lines, lines which are employed in solving the different cases of plane and spherical trigonometry, as sines, tangents, secants, and the like. These lines, or the lengths of them, are trigonometrical functions of the arcs and angles to which they belong.
Trigonometrical survey. See under Survey.
Douglas Harper's Etymology Dictionary
1811; see trigonometry + -ic. Related: Trigonometrical (1660s).
Wiktionary
a. (context mathematics English) of, relating to, or constructed using trigonometry
WordNet
adj. of or relating to or according to the principles of trigonometry; "trigonometric function"
Wikipedia
Usage examples of "trigonometric".
Blake, whose mathematical computations as a mining engineer had never required more than trigonometric and logarithmic tables, became as proficient as the others.
Mary Elise alone in his queen-size bed had him twisted into trigonometric knots.
He reviewed all the figures of the survey, including the Floozie and Doll figures, spoke with the military experts about corrected azimuths and trigonometric functions-which made Dor nervous.