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JEEMAIN and NEET
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Mathematics
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Trigonometry
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Q)
$\large\frac{1-\tan^2(45^{\large\circ}-A)}{1+\tan^2(45^{\large\circ}-A)}$ is equal to
$(a)\;\sin 2A\qquad(b)\;\cos 2A\qquad(c)\;\tan 2A\qquad(d)\;\cot 2A$
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