AP EAMCET202123 Aug 2021Evening ShiftMathematicsPair of LinesActual
If is the angle between the lines x^2+2 h x y+b y^2=0 , then the angle between x^2+2 x y +y^2=0 is
Options
- A2
- B2
- C3
Correct answer
A. 2
Step-by-step solution
Given is the angle between the lines x^2+2 h x y+b y^2=0 To find Angle between x^2+2 x y +y^2=0 Since, we know that angle between the line a x^2+2 h x y+b y^2=0 is = | 2 h^2-a b a+b | Here, a=1 = | 2 h^2-b 1+b | ...(i) For x^2+2 x y +y^2=0a=1, h= , b=1 Let be the angle, then = | 2 ^2 -1 1+1 | = 2 2 = =