A positive charge of magnitude Q1 = 0.45 nC is located at the origin. A negative charge Q2 = -3.5 nC is located on the positive x-axis at x = 16 cm from the origin. The point P is located y = 10.5 cm above charge Q2. Calculate the angle in degrees of the electric field at point P relative to the positive x-axis.

A positive charge of magnitude Q1 = 0.45 nC is located at the origin. A negative charge Q2 = -3.5 nC is located on the positive x-axis at x = 16 cm from the origin. The point P is located y = 10.5 cm above charge Q2. Calculate the angle in degrees of the electric field at point P relative to the positive x-axis.