trigonometric
adjective /ˌtrɪɡənəˈmetrɪk/
/ˌtrɪɡənəˈmetrɪk/
(also trigonometrical
(mathematics /ˌtrɪɡənəˈmetrɪkl/
/ˌtrɪɡənəˈmetrɪkl/
)- connected with the type of mathematics that deals with the relationship between the sides and angles of triangles
三角学