ratio of the adjacent to the opposite side of a right-angled triangle
同义词：cotan
cotangent详细解释
co.tan.gent n.Abbr. cot,ctnMathematics （名词）缩写 cot,ctn【数学】 The reciprocal of the tangent of an angle in a right triangle.余切：直角三角形中角的正切的倒数The tangent of the complement of a directed angle or arc.余切：有方向角或弧的补角的正切 【引伸】 co.tangen.tial
