A smooth curve C is defined by some vector function R(t) with R = (π, 0, -2) and R '(t)= (2, √5 csc t, 2 cott) for all t = (0, π). πT 2 1. Give a vector equation of the line tangent to C at the point where t = 2. Find the moving trihedral of C for all t€ (0, π). E

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