$\"\"$

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The integral is $\"\"$ .

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Rewrite the integral as $\"\"$ .

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Consider $\"\"$ .

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Apply derivative on each side.

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$\"\"$

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$\"\"$

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$\"\"$

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Change in integral limits :

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Lower limit: If $\"\"$ then $\"\"$ .

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Upper limit: If $\"\"$ then $\"\"$ .

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Substitute $\"\"$ , $\"\"$ and change of limits in $\"\"$ .

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$\"\"$

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Consider $\"\"$ .

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Determine the integral interms of an area.

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Find the area of the region under the curve using graphing utility.

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$\"\"$

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Graphically the area of the region is $\"\"$ th of the circle with radius equal to $\"\"$ .

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Therefore, $\"\"$ .

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$ .