$\"\"$

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The integral is $\"\"$ .

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Consider $\"\"$ .

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Apply derivative on each side.

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$\"\"$ .

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Subustiute $\"\"$ and $\"\"$ in the integral.

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$\"\"$

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Rewrite $\"\"$ as $\"\"$ .

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$\"\"$

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The trignometric identity is $\"\"$ .

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$\"\"$ .

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$\"\"$

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Consider the integral $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$

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Subustiute $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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