# how to calculate the dot product ...

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• Mar 23rd 2011, 11:22 PM
problady
how to calculate the dot product ...
How to calculate the dot product of two big vectors in polar coordinate system?
• Mar 24th 2011, 02:02 AM
Ackbeet
Note that

$\mathbf{a}\cdot\mathbf{b}=ab\cos(\theta),$

where

$a=|\mathbf{a}|,\;b=|\mathbf{b}|,\;\text{and}\;\the ta$ is the angle between the two vectors. The RHS should be fairly straight-forward in polar coordinates.