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TS EAMCET · Maths · Differential Equations

The curve that satisfies the differential equation xydy-1+y2dx=0 passes through 1,0 and intersects the curve x2+3y2=3 at an angle θ. Then 2θπ=

  1. A 2
  2. B 0
  3. C 4
  4. D 1
Verified Solution

Answer & Solution

Correct Answer

(D) 1

Step-by-step Solution

Detailed explanation

Given: xydy-1+y2dx=0 ⇒12∫2y1+y2dy=∫dxx ⇒12log1+y2=logx+logC ⇒1+y2=Cx ⇒1+y2=C1x2 It passes through 1,0, so C1=1, hence curve is 1+y2=x2   ....1 Differentiating both sides w.r.t. x, we get 2ydydx=2x ⇒dydx=m1=xy And,…