Two point charge `q_(1)=2muC` and `q_(2)=1muC` are placed at dist

Two point charge `q_(1)=2muC` and `q_(2)=1muC` are placed at distance `b=1` and `a=2cm` from the origin on the `y` and `x` axes as shown in figure .The electric field vector at point `(a),(b)` will subtnd on angle `theta` with the \"x-axis\" given by