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## Homework Statement

Find the magnetic field of a rectangular current loop lying symmetrically on the xy-plane. Find the magnetic field at (0,0,z)

## Homework Equations

Biot-Savart law or derived formula (Mu/4*Pi) * sin(theta2)-sin(theta1)/s

## The Attempt at a Solution

I am NOT good with getting my trianges correctly. I know that B1=B3 and B2=B4 but I cannot figure out the values of the thetas!