$\"\"$

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The functions are $\"\"$ , $\"\"$ and $\"\"$ .

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Consider $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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Consider $\"\"$ .

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Apply derivative on each side with respect to $\"\"$ .

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$\"\"$

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$\"\"$

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Find $\"\"$ .

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$\"\"$

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Substitute the values of $\"\"$ in above expression.

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$\"\"$

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$\"\"$

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Find slope of the tangent at $\"\"$ .

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

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$\"\"$

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Slope of a tangent line is $\"\"$ .

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Find the point corresponding to the value $\"\"$ .

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

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$\"\"$

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$\"\"$

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

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$\"\"$

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$\"\"$ .

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Point of tangency is $\"\"$ .

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Point - slope form of a line equation is $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in point - slope form.

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$\"\"$

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The tangent line equation is $\"\"$ .

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$\"\"$

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The tangent line equation is $\"\"$ .