#### Answer

$x = \frac{5\pi}{4}$

#### Work Step by Step

The least positive number for which $y = cot~x$ is undefined is $\pi$
Let $x - \frac{\pi}{4} = \pi$
Then: $~~x = \frac{5\pi}{4}$

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Published by
Pearson

ISBN 10:
978-0-13-421743-7

ISBN 13:
978-0-13421-743-7

$x = \frac{5\pi}{4}$

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