# Finding tangents and curvature of a parametric curve in 3D [duplicate]

I am in a calculus 3 class and cannot figure out how to get Mathematica to solve for unit tangent, normal tangent, binormal tangent, and curvature without getting a supper messy result. This is the vector below:

$$\qquad r(t)= (e^t \sin(2 t),\, e^t \cos(2t),\, 2e^t)$$

Any help would be great. I know the formulas, but it is so messy that I feel that I am doing it wrong. Thank you for any help.

• Have you seen FrenetSerretSystem[]? – J. M.'s technical difficulties Mar 11 '19 at 12:41
• Please post your code attempt, it’ll he easier to see where you’re going wrong. – morbo Mar 11 '19 at 13:24