A. only I is true
B. only II is true
C. both I and II are true
D. neither I nor lI true
If a circle passes through the point (a, b) and cuts the circle x2+y2=4 orthogonally, then the locus of its centre is
The line 4x+4y-11=0 intersects the circle x2+y2-6x-4y+4=0 at A and B. The point of intersection of the tangents A, B is
If 4l2-5m2+6l+1=0, then the line lx+my+1=0 touches the circle
The equation of the circle whose radius is 5 and which touches the circle x2+y2-2x-4y-20=0 at the point (5, 5) is
A: The polar of (2, 3) with respect to the circle x2+y2-4x-6y+5=0 is 2x+3y=0
R: The polar of (x1, y1) with respect to the circle S=0 is S1=0
The locus of poles of tangets to the circle (x-p)2+y2=b2 w.r.t the circle x2+y2= a2 is
The equation of the circle, with centre (3, -1) and which cuts off a chord of length 6 on the line 2x-5y+18=0 is
If 1,ω,ω<sup>2</sup> are the cube roots of unity, then (1-ω+ ω<sup>2</sup>)5+(1+ω- ω<sup>2</sup>)<sup>5</sup> is equal to
The length of the tangent from a point on the circle x2+y2+4x-6y-12=0 to the circle x2+y2+4x-6y+4=0 is
The foot of the perpendicular from (0, 2, 3) to the line (x+3)/5 = (y-1)/2 = (z+4)/3 is: