Answer:

Explanation:
The unit vector of any vector is the vector that has the same direction as the given vector, but simply with a magnitude of 1. Therefore, if we can find the magnitude of the vector at hand, and then multiply
, where ||v|| is the magnitude of the vector, then we can find the unit vector.
Remember the magnitude of the vector is nothing but the pythagorean theorem essentially, so it would be
which will be
. Now let us multiply the vector by 1 over this value, and rationalize to make your math teacher happy.

You can put those values into your calculator to approximate and get

You can always check the answer by finding the magnitude of this vector, and see that it is equal to 1.
Hope this helps