Question: Find the unit tangent vector to the curve at the specified value of the parameter. r(t) = 4 cos ti + 4 sin tj, t

Find the unit tangent vector to the curve at the specified value of the parameter.

r(t) = 4 cos ti + 4 sin tj, t 4

r(t) = 4 cos ti + 4 sin tj, t 4

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