$\"\"$

\

The parametric equations of an ellipse are $\"\"$ and $\"\"$ on $\"\"$ .

\

The parametric equations $\"\"$ and $\"\"$ , $\"\"$ , area enclosed by the curve is $\"\"$ or $\"\"$ .

\

Consider $\"\"$ .

\

$\"\"$ .

\

Substitute $\"\"$ , $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

The area enclosed by the curves is $\"\"$ .

\

$\"\"$

\

The area enclosed by the curves is $\"\"$ .