Given:
Resistance [tex](X_{R}) = 33 k ohm[/tex]
Inductive reactance [tex](X_{R}) = 42 k ohm[/tex]
We can calculate total impedance (Z) in parallel circuit, by using a reciprocal formula (identical to that used in calculating parallel resistances in DC circuits) as follows.
[tex]1/Z = 1/X_{R} + 1/X_{L}[/tex]
[tex]1/Z = 1/33 + 1/42[/tex]
solving this we get, Z = 18.4798 kΩ