#### Answer

$\dfrac {2}{3}$

#### Work Step by Step

$-\sin \left( -\theta \right) =-\left( -\sin \theta \right) =\sin \theta =\dfrac {2}{3}$
($sine$ is an odd function)

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$\dfrac {2}{3}$

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