(a)
\Conversion from rectangular coordinates to cylindrical coordinates:
\The function is
.
Substitute
in above equation.

The equation in cylindrical coordinates is
.
(b)
\Conversion from rectangular coordinates to cylindrical coordinates:
\The function is
.
Substitute
in above equation.

The equation in cylindrical coordinates is
.
(a) The equation in cylindrical coordinates is
.
(b) The equation in cylindrical coordinates is
.