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Home Q & A Board Science-Related Homework Help Physics
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michelfelcon michelfelcon
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11 years ago
A=AxEx+AyEy+AzEz
B=BxEx+ByEy+BzEz
 find the magnitude of Dot product
Could you also tell me how to find the magnitude of Cross product?
Thank you in advance
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#1
11 years ago
The dot product of vectors A and B is given by
A?B = AxBx + AyBy + AzBz, and it is a scalar so it is equal to its magnitude.

The cross product is given by

A x B = (AyBz - ByAz)Ex + (AzBx - AxBz)Ey + (AxBy - AyBx)Ez, and to find the magnitude of this vector, take its dot product with itself and then take the square root.
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