Question

Asked Jun 12, 2019

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Help with #5

Step 1

Given curve: r(t) = (2cost)i + (2sint)j + tk

Recall the expressions for unit tanget and principal unit normal vectors:

- The Unit Tangent Vector to r(t) at t is T(t) = r'(t) / |r'(t)|
- The Principal Unit Normal Vector to C at t is N(t) = T'(t) / |T'(t)|

Step 2

Please see the white board for subsequent calculations. Recall the famous rules of differentiation:

- d(cosx)/dx = - sinx
- d(sinx)/dx = cosx
- d(x)/dx = 1

Step 3

Please see the white board for further calculations. Recall the famous ru...

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