$\"\"$

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Evaluate $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ then $\"\"$

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$\"\"$

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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From table of integrals : $\"\"$ .

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$\"\"$

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Substitute $\"\"$ in the bove equation.

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$\"\"$

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$\"\"$

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$\"\"$ .