\textbf{118-} The line perpendicular to the graph of $f(x) = \dfrac{\cos 2x}{2 - \sin x}$, at the point of tangency with the $y$-axis, cuts the $x$-axis at which length?
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\hspace{2cm} (1) $0/1$ \hspace{2cm} (2) $0/2$ \hspace{2cm} (3) $0/3$ \hspace{2cm} (4) $0/5$
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