Dictionary  co•tan•gentPronunciation: (kō-tan'junt, kō'tan"-), [key] —n. Trig. 1. (in a right triangle) the ratio of the side adjacent to a given angle to the side opposite. 2. the tangent of the complement, or the reciprocal of the tangent, of a given angle or arc. Abbr.: cot, ctn Also,co•tanPronunciation: (kō'tan"). [key] Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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