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Lagrange's Identity
$$|\vec a\times\vec b|^2+(\vec a\cdot\vec b)^2=|\vec a|^2|\vec b|^2$$
Usage
- Used to relate dot and cross products without explicitly finding the angle.
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Lagrange's Identity
$$|\vec a\times\vec b|^2+(\vec a\cdot\vec b)^2=|\vec a|^2|\vec b|^2$$
Usage
- Used to relate dot and cross products without explicitly finding the angle.
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