KOTANGES funkcija  y = ctg x   li  y = cot x     y = ctgx = (cos x)/(sin x) = 1/(tg x)

Domena (ctg x) = R  \ {π k} , k∈Z       Sli ...   τ = π x = π k   vertikalne  asimptote

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Created by Mathematica  (November 27, 2003)