详细解释:a. 接触的, 正切的, 离题的
n. 切线, 正切
【电】 正切
相关词组:
go off at a tangent
英语解释：
名词 tangent:
a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that pointratio of the opposite to the adjacent side of a right-angled triangle同义词：tan