EXERCISE 2-1

The Matlab m-script helix_trihedron given below plots a 3D image of the circular helix (a = 1, b = 1/2 ). The script also plots the moving trihedron at regular intervals on the helix. This is composed of the unit vectors (tangent, principal normal, binormal) which are derived in questions 2, 3, and 6 below. ................
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