Simplify and choose the equivalent expressions — task. Mathematics CBSE, Class 10.

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1.

$\tan^2 θ - \sin^2 θ$

$=$

$\tan^2 θ + \sin^2 θ$
$\tan θ \sin θ$
$\tan^2 θ \sin^2 θ$

2.

$\tan^4 θ + \tan^2 θ$

$=$

$\tan^4 θ + \sec^2 θ$
$\sec^4 θ - \sec^2 θ$
$\sec^4 θ + \sec^2 θ$

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