Question
tan⁻¹ x + tan⁻¹ y = c is the general solution of the differential equation
Options :
dy/dx = 1+y2/1+x2
dy/dx = 1+x2/1+y2
(1 + x²)dy + (1 + y²)dx = 0
(1 +x²2)dx+(1 + y²)dy = 0
Answer :
(1 + x²)dy + (1 + y²)dx = 0
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