Answer: cotangent

AnswerCrossword Clue
COTANGENTAdjacent-over-opposite in right triangles
COTANGENTPrecalculus calculation
COTANGENTRelative of a secant.
cotangentthe tangent of the complement of an arc or angle
cotangent(in a right-angled triangle) The ratio of the side (other than the hypotenuse) adjacent to a particular acute angle to the side opposite the angle