Let \( f(x) =\displaystyle \lim_{y \to 0} \dfrac{(1 - \cos(xy)) \tan(xy)}{y^{3}} \). Then the number of solutions of the equation \( f(x) = \sin x, \, x \in \mathbb{R} \) is:
\( 0 \)
\( 2 \)
\( 3 \)
\( 1 \)