The equation of the ellipse is $\"\"$ and the point $\"\"$ .

Consider $\"\"$ .

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

$\"\"$

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

$\"\"$

Find the equation of the tangent line.

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

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

$\"\"$

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