If has constant torsion show that where and represents the tangent vector from the Frenet frame.

I was thinking of representing through it's Taylor series but that got me nowhere. So I would have . But this doesn't seem to help.

Know I figured that since we are dealing with constant torsion we can just express it through the formula yielding:

now rearranging and using the dot product with I get

Now I don't know If I'm on the right track or if this is even correct.