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Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: a X[b X(c X a) + (p X q)]=? ans:(a.q)p+(b-a)(a X c) how?
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[Post New]14 May 2008 13:59:01 IST
    Subject: Re:a X[b X(c X a) + (p X q)]=? ans:(a.q)p+(b-a)(a X c) how?
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allamraju (3415)

Blazing goIITian

Olaaa!! Perrrfect answer. 605  [800 rates]
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I got a diff ans but I think it is correct.

bX(cXa)=(b.a)c-(b.c)aaX[bX(cXa)]=(b.a)(aXc) [since aXa=0,second term is 0]

Now,aX(pXq)=(a.q)p-(a.p)q.So,the ans is (b.a)(aXc)+(a.q)p-(a.p)q
MAKING A MISTAKE IS HUMAN BUT REPEATING IT IS IDIOTIC.
 this reply: 5 points  (with 1 Olaaa!! Perrrfect answer.   in 1 votes )   [?]
 
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