Merriam-Webster Collegiate Dictionary - cotangent
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Cotangent
cotangent
noun Etymology: New Latin ~-, cotangens, from co- + tangent-, tangens tangent Date: 1635 1. a trigonometric function that for an acute angle is the ratio between the leg adjacent to the angle when it is considered part of a right triangle and the leg opposite 2. a trigonometric function cot ? that is equal to the cosine divided by the sine for all real numbers ? for which the sine is not equal to zero and is exactly equal to the ~ of an angle of measure ? in radians
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1.
n. Math. the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the opposite side. ...Толковый словарь английского языка Oxford English Reference
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5.
~ n technical the measurement of an angle in a triangle (1) with a right angle (1) that is calculated by dividing the length of the side opposite it by the length of the side next to it (- compare tangent (3)) coterie ~ n a small group of people who enjoy doing the same things together, and do not like including others ...Longman Dictionary of Contemporary English
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