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[Post New]11 Aug 2007 13:51:19 IST
    Subject: Re:answer to this pls
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bhuvana89 (1051)

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Olaaa!! Perrrfect answer. 177  [260 rates]
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ya i too got the ans as 6(sinxcosx  -1 )
 
Use this :
 
1.   Sin6x + cos6x  = 1-3sin2xcos2x
 
(u get this result by expanding ( sin2x ) 3 + ( cos2x )3
 
 
2.  cos4x + sin4x  =   1- 2 sin2xcos2x
 
 
use these to simplify and get the result
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