1. The problem statement, all variables and given/known data http://www.ridemtl.com [Broken] 2. Relevant equations F = k(q1q2/r^2) 3. The attempt at a solution I know pretty much what to do for the problem, but I cannot get the right answer. I think my issue lies within what angles I am using for the components. Because it is an equilateral triangle, all angles within that triangle are 60 deg. But when I use 60 deg to calculate the components in the x & y directions, I can't come up with the right answer. F of 2 on 1 = 0.0579 N F of 3 on 1 = 0.0358 N x: 0.0579 cos 60 -i, 0.0358 cos 60 +i y: 0.0579 sin 60 -j, 0.0358 sin 60 -j Sum these together and use Pythagoras for overall magnitude The magnitude the above produces is 0.0818 N I am not getting the right answer. Thus I think my problem lies in the angles I am using. Can anyone shed some light?