In the circuit shown below, if the source voltage $V_s=100\angle 53.13^\circ$ Volts, then the Thevenin’s equivalent voltage in Volts as seen by the load resistance $R_L$ is
- $100 \angle 90^\circ$
- $800 \angle 0^\circ$
- $800 \angle 90^\circ$
- $100 \angle 60^\circ$