Differential EquationHard
Question
The solution of the equation 
is-
is-Options
A.c (x2 + y2)1/2 + etan−1(y/x) = 0
B.c (x2 + y2)1/2 = etan−1(y/x)
C.c (x2 − y2)1/2 = etan−1(y/x)
D.None of these
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