MathCastle
Multivariable CalculusMediumCurves & Motion

Curves & Motion · Medium problem

Find the length of the helix r(t)=(2cos⁡t, 2sin⁡t, 4t)\mathbf r(t) = (2\cos t,\ 2\sin t,\ 4t) for 0≤t≤2π0 \le t \le 2 \pi. Give an exact answer.