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## Homework Statement

Two tiny objects with equal charges of 7.48 µC are placed at the two lower corners of a square with sides of 0.350 m, as shown.

Image: http://www.webassign.net/grrphys2/16-p-039.gif

Find the electric field at point A, the upper left corner. (Assume the positive x-direction points to the right.)

magnitude: ____N/C

direction: ____° CCW from the positive x-axis

## Homework Equations

kq/r^2

## The Attempt at a Solution

I already got the magnitude right, here's what I did:

kq/r^2

= 8.99e9 (7.48e-6)/(.350)^2 = 5.49e+5

Where I'm stuck is the direction.

I tried tan theta = (.350) and that was wrong, and I tried tan theta= (.35/2)/.35 and that was wrong also.

Any help would be greatly appreciated. This is due tonight. Thanks in advance.