$\"\"$

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The vectors are $\"\"$ and $\"\"$ .

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Find : $\"\"$

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$\"\"$

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To find : $\"\"$ , apply dot product formula: $\"\"$ .

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$\"\"$ (Substitute : $\"\"$ )

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$\"\"$

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$\"\"$ . (Simplify) $\"\"$

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The result of $\"\"$ and the result is a "scalar".