It will be a 2D vector, and parallel to the line defined by the tangent at that point.

To find the tangent, which will be of the form , to find , take the derivative, then evaluate the derivative at that point.

.

Thus .

We have

We also have as a point on the tangent.

So

.

Thus the tangent is .

So you will have a vector that is parallel to and that passes through .

Can you go from here?