Given, point P (x,y,z)

From the figure, we can clearly see the projection of point P on the XOZ plane.

The projection of P on the x-axis will be (x,0,0)

The projection of P on the z-axis will be (0,0,z)

By this we can say that, if we are considering the projection of P on the XOZ plane, the coordinates of Y-axis will be zero,

Hence the projection of point P(x,y,z) on the XOZ plane will be point E(x,o,z).