)The parametre equations `x=(2a(1-t^2))/(1+t^2) and y=(4at)/(1+t^2)` represents a circle whose radius is

Consider the parametric equation x=(a(1-t^(2)))/(1+t^(2))" and "y=(2at)/(1+t^(2)) What does the equation represent ?

If x=(1-t^2)/(1+t^2) and y=(2t)/(1+t^2) ,then (dy)/(dx)=

Consider the parametric equation x=(a(1-t^(2)))/(1+t^(2))" and "y=(2at)/(1+t^(2)) What is (dy)/(dx) equal to ?

Consider the parametric equation x=(a(1-t^(2)))/(1+t^(2))" and "y=(2at)/(1+t^(2)) what is (d^(2)y)/(dx^(2)) equal to

The eccentricity of the conic x=3((1-t^(2))/(1+t^(2))) and y=(2t)/(1+t^(2)) is

If x=a((1+t^(2))/(1-t^(2))) and y=(2t)/(1-t^(2)), find (dy)/(dx)

If x=(1-t^(2))/(1+t^(2)) and y=(2t)/(1+t^(2)) , then (dy)/(dx) is equal to