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Vector Identity for Difference of Squares
$$|\vec a+\vec b|^2-|\vec a-\vec b|^2=4\vec a\cdot\vec b$$
Usage
- Used to find the dot product from the magnitudes of vector sum and difference.
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Vector Identity for Difference of Squares
$$|\vec a+\vec b|^2-|\vec a-\vec b|^2=4\vec a\cdot\vec b$$
Usage
- Used to find the dot product from the magnitudes of vector sum and difference.
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