noun🔗Share余切 In a right triangle, the reciprocal of the tangent of an angle. Symbols: cot, ctg or ctn"In a right triangle, if the tangent of angle A is 2, then the cotangent of angle A is 0.5. "在直角三角形中,如果角A的正切是2,那么角A的余切就是0.5。mathtechnicalChat with AIVocabulary GamePractice Reading