There is a circle with center O. P is a point from where only one tangent can be drawn to this circle. What can we say about P?
P is on the circle.
Since only one tangent can be drawn, this point P should be present on the circle.
If a point lies outside the circle, two tangents can be drawn to the circle from the point.
If a point lies inside the circle, no tangents can be drawn from the point inside the circle.