Question

Two positive charges q1 and q2 fixed to a circle. At the center of the circle they produce a net electric field that is directed upward along the vertical axis. Determine the ratio q2/q1.
Angle for q1 is 30 degrees from diameter.
Angle for q2 is 60 degrees from diameter.

Answer 1

Are these angles above or below the diameter?

Answer 2

Also, is that diameter vertical or horizontal?
If vertical and charges below:
horizontal components equal and opposite
(kQ2/r^2) cos 60 = (k Q1/r^2) cos 30
Q2 cos 60 = Q1 cos 30
Q2/Q1 = cos 30/cos 60