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Given r(t) = (et cos(t) )i + (et sin(t) )j + 2k. Find (i) unit tangent...

Given r(t) = (et cos(t) )i + (et sin(t) )j + 2k. Find

(i) unit tangent vector T.

(ii) principal unit normal vector N.

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Unit tangent vector and principal normal vector

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