Function of {x ∈ \(\mathbb{R}\) | x ≠ \(\dfrac{π}{2}\) + kπ, où k ∈ \(\mathbb{Z}\)} in \(\mathbb{R}\) defined by \(f(x) = \dfrac{\sin (x)}{\cos (x)}\).
Notation
The tangent function is noted as “tan(x)” which is read as “tangent of x.”
Some English texts use the notation “tg(x).”
Example
The representation of the base function defined by the relation f(x) = tan(x) is:
