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17-04-2014
Mathematics

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Verify the identity
Cos^2x-Sin^2x=1-2sin^2x

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17-04-2014

[tex]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[/tex]

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