$\"\"$

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The integral is $\"\"$ .

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The indicated trignometric subustitution is $\"\"$ .

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Subustiute $\"\"$ and $\"\"$ .

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$\"\"$ $\"\"$

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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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Use the identity $\"\"$ .

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$\"\"$

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Apply the sum and difference rule of integration : $\"\"$ .

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$\"\"$

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$\"\"$

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The indicated trignometric subustitution is $\"\"$ .

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$\"\"$

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$\"\"$

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In the right triangle $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$

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Associate Right Triangle :

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$\"\"$

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$\"\"$

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$\"\"$ $\"\"$ .