For the given position vectors r(t). compute the (tangent) velocity vector r' (t) for the given value of t. A) Let r(t) = (cos 3t, sin 3t). Then r'(4)=( B) Let r(t) = (², ³). Then r'(5)= ( C) Let r(t) = e³ti+e-5tj + tk. Then r' (1)= i+ j+ )? )? k?

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