1 – $cos^{2}$A is equal to:
$sin^{2}A$
$tan^{2}A$
$1 – sin^{2}A$
$sec^{2}A$
Explanation:
We know, by trigonometry identities,
$sin^{2}A$ + $cos^{2}A$ = 1
1 –$cos^{2}A$ =$sin^{2}A$
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