$\"\"$

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The function is $\"\"$ .

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

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$\"\"$

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derivatives of inverse trigonometric functions : $\"\"$ .

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$\"\"$

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$\"\"$

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To find the relative extrema,solve $\"\"$ .

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$\"\"$

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Critical point is $\"\"$ .

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$\"\"$

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Find the value of the function at $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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The point is $\"\"$ .

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$\"\"$

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$\"\"$

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

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$\"\"$

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Find the sign of $\"\"$ at $\"\"$ .

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$\"\"$

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The relative maximum point is $\"\"$ .

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$\"\"$

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The relative maximum point is $\"\"$ .