#### Answer

$$
Q_\theta = re^\theta, \quad
Q_r= e^\theta .
$$

#### Work Step by Step

Recall that $(e^x)'=e^x$
Since $ Q=re^\theta $, then we have
$$
Q_\theta = re^\theta, \quad
Q_r= e^\theta .
$$

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Published by
W. H. Freeman

ISBN 10:
1464125260

ISBN 13:
978-1-46412-526-3

$$
Q_\theta = re^\theta, \quad
Q_r= e^\theta .
$$

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