MEDIUM
JEE Main/Advance
IMPORTANT
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The number of common tangents of the circles x2+y2-2x-1=0 and x2+y2-2y-7=0

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Important Questions on Circle

MEDIUM
JEE Main/Advance
IMPORTANT
If the circle x2+y2=9 touches the circle x2+y2+6y+c=0, then c is equal to
MEDIUM
JEE Main/Advance
IMPORTANT
If the two circles, x2+y2+2g1x+2f1y=0 and x2+y2+2g2x+2f2y=0 touches each other, then
MEDIUM
JEE Main/Advance
IMPORTANT
The tangent from the point of intersection of the lines 2x-3y+1=0 and 3x-2y-1=0 to the circle x2+y2+2x-4y=0 is
MEDIUM
JEE Main/Advance
IMPORTANT
The locus of the centres of the circles which cut the circles x2+y2+4x-6y+9=0 and x2+y2-5x+4y+2=0 orthogonally is-
HARD
JEE Main/Advance
IMPORTANT
Let fx=x2+6x+1 and R denote the set of points x, y in the coordinate plane such that fx+fy0 and fx-fy0. The area of R is equal to -
MEDIUM
JEE Main/Advance
IMPORTANT
If a,1a,b,1b,c,1c & d,1d are four distinct points on a circle of radius 4 units then, abcd =
MEDIUM
JEE Main/Advance
IMPORTANT
Three equal circles each of radius r touch one another. The radius of the circle touching all the three given circles internally is
MEDIUM
JEE Main/Advance
IMPORTANT
The distance between the chords of contact of tangents to the circle x2+y2+2gx+2fy+c=0 from the origin and from the point g,f is