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CBSE Notes 2011-2012

If sin A = 4/5 then 1 - 2 sin2A =

Multiple choice question

If sin A = 4/5 then 1 - 2 sin2A =

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1 - 2 cos2 A

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cos2 A - sin2 A

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2 sin2 A + 1

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sin2 A - cos2 A