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A) \[2\cos \,(xy)+{{x}^{-2}}=c\]
B) \[2\cos \,(xy)+{{y}^{-2}}=c\]
C) \[2\sin \,(xy)+{{x}^{-2}}=c\]
D) \[2\sin \,(xy)+{{y}^{-2}}=c\]
Correct Answer: A
Solution :
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