What does trigonometrical mean?
Trigonometrical is a formal or dated adjective meaning relating to trigonometry, the branch of mathematics concerned with angles and the ratios of sides in triangles. It is especially associated with geometry, surveying, navigation, and classical mathematical terminology, in which measured angles and side ratios allow positions and distances to be calculated. Phrases such as “trigonometric functions,” “trigonometric ratios,” and “trigonometric identities” are well established, although the shorter adjective “trigonometric” is more usual today. The word’s transparent classical formation reflects its subject: its elements point toward triangles and measurement. For precise mathematical contexts, “trigonometrical” remains readily understood and may add a traditional or scholarly tone. In general contemporary writing, however, “trigonometric” is usually the clearer and more natural choice.
adjectiveRelating to trigonometry, especially the measurement of triangles through angles and ratios of sides. Also, relating to the trigonometric functions.
- Relating to trigonometry or to the measurement of triangles by means of angles and ratios.
"The surveyors used trigonometrical calculations to determine the distance between two points."
"The surveyors used trigonometrical calculations to determine the distance between two points."
"Several trigonometrical identities follow directly from the Pythagorean theorem."
Trigonometrical wears its meaning in plain sight: it is mathematics devoted to measuring triangles.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of trigonometrical
Trigonometrical is an English derivative of trigonometry, with an adjectival suffix added to the mathematical noun. Trigonometry in turn combines the Greek trigonon, meaning “triangle,” with metron, meaning “measure,” reflecting the ancient practice of determining inaccessible lengths through angles. Related English forms include trigonometric, trigonometry, triangle, and trigonometer.
Related word forms
How trigonometrical is actually used
Formal and relatively uncommon in modern English. The shorter form “trigonometric” is generally preferred in contemporary mathematical and scientific prose.
Easily confused with trigonometrical
Both words are adjectives meaning “relating to trigonometry,” but “trigonometric” is the more common form in modern mathematical writing.