| 释义 |
> as lemmastrigonometrical station trigonometrical functions, those functions of an angle, or of an abstract quantity, used in trigonometry, viz. the sine, tangent, secant, etc.: see trigonometry n. trigonometrical point, trigonometrical station, a reference point on high ground, usually marked by a small pyramidal structure, used in triangulation. trigonometrical survey, a survey of a country or region performed by triangulation and trigonometrical calculation.< |