$\"\"$

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The integral is $\"\"$ .

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From the trigonometric substitution, substitute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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From the Pythagorean identity:

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$\"\"$ .

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$\"\"$

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It is in the form of $\"\"$ .

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$\"\"$ .

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

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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Replace the value $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$

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From the Pythagorean identities: $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .