$\"\"$

\

The parametric equations are $\"\"$ and $\"\"$ .

\

Eliminate parameter $\"\"$ .

\

Consider $\"\"$ .

\

$\"\"$ .

\

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

\

$\"\"$

\

Squaring on each side.

\

$\"\"$

\

$\"\"$

\

The rectangular equation is $\"\"$ .

\

The domain of the rectangular equation $\"\"$ .

\

$\"\"$

\

The rectangular equation is $\"\"$ .

\

The domain of the rectangular equation $\"\"$ .