You calculate the angle of two vectors added together. Your calculator gives you a positive answer of 38.72°. However, you know that both the x-component and y-component are negative. The angle in standard form is what?

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.