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February 1, 2015

February 1, 2015

Posted by **Sam** on Wednesday, February 29, 2012 at 5:15pm.

- PHYSICS!! SOS -
**bobpursley**, Wednesday, February 29, 2012 at 5:33pmtake the dot product...

remember i dot i is 1, j dot j is 1, k dot k is 1, whereas any of the ij, jk, ki dot products is zero.

I will start you.

A dot B= 3i dot 3i + 1j dot(-2j) + ....

A.B=9+(-2)+ ...

then add them

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