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17-04-2014
Mathematics

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Cos^2x-Sin^2x=1-2sin^2x

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Anonymous Anonymous

17-04-2014

\(cos^2x-sin^2x=1-2sin^2x\\\\\\R=1-2sin^2x=cos^2x+sin^2x-2sin^2x=cos^2x-sin^2x=L\\\\\\\\\\sin^2x+cos^2x=1\)

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