Step 1:

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

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The angle between two vectors u and v then $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Substitute the values of $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Solution :

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The expression is $\"\"$ and approximate to $\"\"$ .