Consider the helix r(t)=(cos(2t),sin(2t),−4t)r(t)=(cos⁡(2t),sin⁡(2t),−4t). Compute, at t=π6t: A. The unit tangent vector T=? B. The unit normal vector N=? C. The unit binormal vector B=? D. The curvature κ=?

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