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TS EAMCET · Maths · Application of Derivatives

If θ is the angle between the curves y2=4x and x2+y2=5 then tanθ=

  1. A 5
  2. B 4
  3. C 3
  4. D 2
Verified Solution

Answer & Solution

Correct Answer

(C) 3

Step-by-step Solution

Detailed explanation

Point of intersection of y2=4x & x2+y2=5: x2+4x+4=9⇒x+2=±3 ⇒x=1,-5 (rejected) & y=±2 Now, at 1,2: For y2=4x 2ydydx=4 ⇒m1=dydx1,2=22=1 For x2+y2=5 2x+2ydydx=0 ⇒m2=dydx1,2=-12 Now, tanθ=m1-m21+m1m2 =1+121-12=3…