$\"\"$

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The integration function is $\"\"$ .

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$\"\"$

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The trignometric identity is $\"\"$ .

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$\"\"$

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Where $\"\"$ and $\"\"$ .

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$\"\"$

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Sum and difference rule of integration : $\"\"$ .

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$\"\"$

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Power rule of integration: $\"\"$ .

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$\"\"$

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Substitute $\"\"$ in above equation.

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$\"\"$

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Thus, $\"\"$ .

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$\"\"$

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$\"\"$ .