$\"\"$

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(a)

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The integral is $\"\"$ .

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Let $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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From the table of integrals Formula 83: $\"\"$ .

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$\"\"$

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From the table of integrals Formula 82: $\"\"$ .

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Substitute above value in $\"\"$ .

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$\"\"$

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Replace $\"\"$ in above expression.

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$\"\"$

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$\"\"$

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$\"\"$

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(b)

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The integral is $\"\"$ .

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Find the integral using integration by parts.

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Integration by parts : $\"\"$ .

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Consider $\"\"$ and $\"\"$ .

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Consider $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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Consider $\"\"$ .

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Apply integral on each side.

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$\"\"$

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$\"\"$ .

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Substitute corresponding values in $\"\"$ .

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$\"\"$

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Consider $\"\"$ .

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Let $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute corresponding values in $\"\"$ .

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$\"\"$

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Substitute above result in (1).

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$\"\"$

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$\"\"$ .

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$\"\"$

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(a) $\"\"$ .

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(b) $\"\"$ .