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  1. 05-19-2015, 01:49 AM Top | #1
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    y=cos^2 x- sin^2 x + 1+cosx


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  3. 05-19-2015, 02:44 PM Top | #2
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    Yahoo

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    ; 05-25-2015 11:16 PM


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  7. 05-20-2015, 04:14 PM Top | #4
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  9. 05-20-2015, 06:35 PM Top | #5
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