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A Writer's Dictionary:

cotangent Definition


Dictionary Home » Words Starting with C » cosmo- ... couldn't » cotangent


cotangent
noun
    1. trig.
      For a given angle in a right-angled triangle: a function (noun 4) that is the ratio of the length of the side adjacent to the angle under consideration, to the length of the side opposite it; the reciprocal of the tangent of an angle.
Etymology: 17c: from co- short for complement 4 + tangent.



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