The integral is $\"\"$ .

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Rewrite the integral as $\"\"$

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$\"\"$

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Recall the trigonometric identity $\"\"$

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$\"\"$

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Recall the algebraic formula: $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Assume $\"\"$ .

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Differentiate on each side with respect to $\"\"$ .

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$\"\"$

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Substitute $\"\"$ in above integral summation.

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$\"\"$

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Power rule of integration: $\"\"$

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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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$\"\"$

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Solution:

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$\"\"$

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