$\"\"$

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The definite integral is $\"\"$ .

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The maclaurin series of $\"\"$ is $\"\"$ , $\"\"$ .

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Consider $\"\"$ .

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Multiply each side by $\"\"$ .

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$\"\"$

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Apply integral on each side on $\"\"$ .

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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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Calculate the value upto four decimal plaes.

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Calculate the terms upto $\"\"$ .

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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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$\"\"$

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$\"\"$ .