Mathematics · Differential Equations
tan-1x + tan-1y = c is the general solution of the differential equation:
- 1dydx = 1 + y21 + x2
- 2dydx = 1 + x21 + y2
- 3(1 + x2) dy + (1 + y2) dx = 0✓
- 4(1 + x2) dx + (1 + y2) dy = 0
Correct answer
(1 + x2) dy + (1 + y2) dx = 0
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