Of, pertaining to, or obtained using trigonometry (adjective)
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Use "trigonometrical" in a sentence
"Surveying and building trigonometrical station on a light-coloured hill to the south of this."
"According to his biographer, Carlyle had studied astronomy, and in the summer of 1817 had come upon "the site of a trigonometrical survey" while hiking with a friend. 2 The pair was given a guided tour of the site, and were allowed to peer through the surveyors 'theodolite."
"If any one shall attempt to determine this ellipse by trigonometrical computation from three observations (as is usual) he will be proceeding without due caution."