1.

The solution of the differential equation \[{{x}^{2}}\frac{dy}{dx}\cos \frac{1}{x}-y\sin \frac{1}{x}=-1\], where \[y\to -1\,\,as\,\,x\to \infty \]is

A. \[y=\sin \frac{1}{x}-\cos \frac{1}{x}\]
B. \[y=\frac{x+1}{x\sin \frac{1}{x}}\]
C. \[y=\cos \frac{1}{x}+sin\frac{1}{x}\]
D. \[y=\frac{x+1}{x\cos 1/x}\]
Answer» B. \[y=\frac{x+1}{x\sin \frac{1}{x}}\]


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