Definitions for

**"Cotangent"**The tangent of the complement of an arc or angle. See Illust. of Functions.

In a right triangle, the ratio of the length of the adjacent side to the length of the opposite side; the reciprocal of the tangent.

For any acute angle in a right triangle, the ratio of the length of the opposite side, to the length of the adjacent side. Cot x = 1/tan x