line tangent to a curve

If you have a circle and then draw an arbitrary line off to the side
somewhere....is there a way to move the line so that it touches the circle
only at the point of tangency?? The "tangent" osnap command doesn't seem to
do the trick.
somewhere....is there a way to move the line so that it touches the circle
only at the point of tangency?? The "tangent" osnap command doesn't seem to
do the trick.