Two circles with equal radii intersecting at the points (0,1) and (0,-1). The tangent at the point (0,1) to one of the circles passes through the centre of the other circle.Then the distance between the centres of these circles is:
2
1
Orthogonality of two circle -
Two circles and are said to be orthogonal ,if tangents at their point of intersection include right angle.
- wherein
Let centre of circle are &
equation of circles are
and
since circles are orthogonal so ,
Distance between & is
2
Option 2)Option 3)
Option 4)
1
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