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arc cotangent

noun

Trigonometry.
  1. the angle, measured in radians, that has a cotangent equal to a given number. : arc cot : cot −1


arc cotangent

  1. The inverse of the cotangent function.
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Word History and Origins

Origin of arc cotangent1

First recorded in 1905–10

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arc cosineArc de Triomphe