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[Post New]18 Mar 2008 17:14:58 IST
    Subject: Re:guidelines for mathematics class twelth
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vacuumhead_pratyush (77)

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q 25
1+cos x = 2 cos^2 (x/2)
and 1+ sin x = 1+ 2 cos (x/2) sin (x/2)
= integral of e^x {1/2 sec^2 (x/2) + tan (x/2)}
= e^x {tan (x/2)}
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