Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of cotangent is as below...

Cotangent :: Cotangent (n.) The tangent of the complement of an arc or angle. See Illust. of Functions.

Mesologarithm :: Mesologarithm (n.) A logarithm of the cosine or cotangent.

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