Four similar (+q) are placed at origin O, B, C and D as shown. The angles are as shown. Charges at B, C and D are equidistant from O at a distance of a. The forces of repulsion experienced by charge at O due to charges at B and D along CO are equal, given by q^2 root 3 /8πε 0 a^2. Find the relation between θ1, θ2 and θ3:
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