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The computation is easier if You take into account the identity... Kind regards
Last edited by chisigma; Dec 28th 2010 at 07:08 AM. Reason: corrected a mistake...
Is my answer no correct or not ?
No, it isn't. You have the formula correct but then you used which is wrong.
Originally Posted by chisigma The computation is easier if You take into account the identity... Kind regards Actually it's .
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