IMO ans is Dneoreaves wrote:IN THE XY-PLANE, POINT (R,S) LIES ON THE CIRCLE WITH CENTER AT ORIGIN. WHAT IS THE VALUE OF R^2 + S^2?
I. THE CIRCLE HAS RADIUS 2
II. THE POINT (V2, -V2) LIES ON THE CIRCLE
since the center of the circle is origin the distance of point (R,S) from center will be sqroot(R^2+S^2) and (R,S) lies of the circle so this brings down the question to the fact that what is the radius of the circle as that is equal to sqroot(R^2+S^2) or
R^2+S^2=square of radius
now statement 1 provides the radius directly-->Suff
Statement 2 provides another point on circle.so square of radius will be radius will be 2+2=4-->suff
hence either of the statements is sufficient to ans
