$\"\"$

(a)

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

Hyperbolic identity: $\"\"$ .

Substitute $\"\"$ and $\"\"$ in the identiy.

$\"\"$ .

The curve equation in cartesian form is $\"\"$ . $\"\"$

(b)

The curve equation is $\"\"$ .

Graph:

Graph the parametric equations $\"\"$ and $\"\"$ :

$\"\"$

(a) The curve equation in cartesian form is $\"\"$ .

(b)

Graph of the parametric equations $\"\"$ and $\"\"$ is

$\"\"$