- #1

chetzread

- 801

- 1

## Homework Statement

Find the unit tangent vector T(t) for vector valued function r(t) = (e^t)(cos t ) i + (e^t)(sin t ) j + (e^t) k

## Homework Equations

## The Attempt at a Solution

i gt stucked here ...

, the ans is [1/ sqrt (3) ] [ (cos t -sin t ) i + (sin t + cos t ) j +k) [/B]