The electric potential for various points in x -y plane is given by V =1.0 x^2 -2.0 y^2, where V is in volts and x, y are in metres. The angle that…

The electric potential for various points in $\displaystyle x$-y plane is given by $\displaystyle \mathrm{V}=1.0 x^{2}$ $\displaystyle -2.0 \mathrm{y}^{2}$, where V is in volts and $\displaystyle x$, y are in metres. The angle that the electric field at point ($\displaystyle 2.0$ m, $\displaystyle 1.0$ m) makes with the positive $\displaystyle x$-axis is -