n. 余切

[电] 余切

[ noun ]
ratio of the adjacent to the opposite side of a right-angled triangle
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Cotangent \Co*tan"gent\ (k?-t?n"jent), n. [For co. tangens, an
abbrev. of L. complementi tangens. See {Tangent}.] (Trig.)
The tangent of the complement of an arc or angle. See Illust.
of {Functions}.