#### Answer

$sec^{2}\theta $

#### Work Step by Step

$\left( 1+\tan \theta \right) ^{2}-2\tan \theta =\left( 1+2\tan \theta +\tan ^{2}\theta -2\tan \theta \right) =1+\tan ^{2}\theta =sec^{2}\theta $

Published by
Pearson

ISBN 10:
013421742X

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

$sec^{2}\theta $

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