You can have a tangent line for every point on a circle, so the answer is theoretically infinite.
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A secant line touches a circle at two points. On the other hand a tangent line meets a circle at one point.
Although normally it is the line that is considered to be tangent to an arc, an arc can be tangent to infinitely many lines and so the answer to the question is: in infinitely many ways.
A tangent of a circle is a straight line that touches the circle at only one point.
That's not a question -- not even a sentence.
Only one which is a tangent to that circle.