AP EAMCET2001MathematicsHyperbola
Equation of curve in polar coordinates is l r =2 ^2 2 , then it represents
Options
- Aa straight line
- Ba parabola
- Ca circle
- Dan ellipse
Correct answer
B. a parabola
Step-by-step solution
We have, l r =2 ^2 2 l r =1- array rlrl & l & =r(1- ) l+r =r & & r^2 & =(l+r )^2 & x^2+y^2 & =(l+x)^2 & x^2+y^2 & =l^2+x^2+2 l x & & y^2 & =2 l (x+ l 2 ) array Which represents a parabola.