#### Answer

$\pi$

#### Work Step by Step

$\tan x= 0\implies \frac{\sin x}{\cos x}=0\implies \sin x=0$
$\sin x=0$ when $x=n\pi$
The least positive value is obtained by setting $n=1$
$x=n\pi=1\times\pi=\pi$

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Published by
Pearson

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

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

$\pi$

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