$\begin{array}{1 1} (A)\;x(\sin y+\cos y)=\sin y+ce^{-y} \\ (B)\;x(\sin y-\cos y)=\sin y-ce^{-y}\\(C)\;x(\sin y-\cos y)=\sin y+ce^{-y} \\ (D)\;x(\sin y+\cos y)=\sin y-c\end{array}$
