Find $\frac {dy}{dx}$ in the following: $2x +3y = sin \: y$

Question

$\begin{array}{1 1} \large \frac {2}{cosy-3} \\ \large \frac {2}{cosy+3} \\ \large \frac {-2}{siny+3} \\ \large \frac {2}{siny-3} \end{array} $