Solution of the equation \[\cos x\cos y\frac{dy}{dx}=-\sin x\sin y\]is

1.	Solution of the equation \[\cos x\cos y\frac{dy}{dx}=-\sin x\sin y\]is [DSSE 1987]
A.	\[\sin y+\cos x=c\]
B.	\[\sin y-\cos x=c\]
C.	\[\sin y.\cos x=c\]
D.	\[\sin y=c\cos x\]
Answer» E.

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Solution of the equation \[\cos x\cos y\frac{dy}{dx}=-\sin x\sin y\]is [DSSE 1987]

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