I've have another question how do you find a vector which is perpendicular to both 3i-6j-4k and -3i+2j+2k
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Originally Posted by kandyfloss how do you find a vector which is perpendicular to both 3i-6j-4k and -3i+2j+2k Find the cross-product: $\displaystyle <3,-6,-4>\times<-3,2,2>$.
i need to find without using the cross product,since we haven't learnt that yet
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