Question

$prove \: this$
$sec {}^{2} \alpha - \frac{sin {}^{2} \alpha - 2sin {}^{4} \alpha }{2cos {}^{4} \alpha - cos {}^{2} \alpha } = 1$
ANSWER SHOULD BE FULL EXPLAINED

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Answer 1

Answer:

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Answer 2

Step-by-step explanation:

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