$\"\"$

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The area under the curve $\"\"$ in between $\"\"$ and $\"\"$ is $\"\"$ .

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Therefore $\"\"$ .

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Substitute $\"\"$ in the above equation.

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$\"\"$

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Integral of hyperbolic function : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Since $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Graph:

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Graph of $\"\"$ .

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$\"\"$

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Observe the graph:

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The area under the curve is $\"\"$ for $\"\"$ and $\"\"$ .

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$\"\"$

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The area under the curve is $\"\"$ for $\"\"$ and $\"\"$ .