A. 15√13/3
B. 5√3/13
C. 4√15/17
D. 15√3/13
From the origin chords are drawn to x2+y2-2y=0. The locus of the middle points of these chords is
Consider a family of circles which are passing through the point (-1, 1) and are tangent to x-axis. If (h, k) are the co-ordinates of the centre of the circles, then the set of values of K is given by the interval
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The condition that the pair of tangents drawn from (g, f) to the circle x2+y2+2gx+2fy+c=0 may be at right angles is
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