$\"\"$

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Dot Product :

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If $\"\"$ and $\"\"$ are vectors, then their dot product,

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denoted by $\"\"$ , is defined by $\"\"$ .

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The vector is $\"\"$ .

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The magnitude of u is $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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The magnitude of u is $\"\"$ .