Here's the question you clicked on:
Ikushinkan
Gauss's Law If flux=AEcos(theta) what's the angle (orientation) between electric field (E) and the Area (A) (i) for max flux and (ii) min flux I do not know how to start answering this question please help and explain :( Please and thank you!
note that theta is actually that angle...
for flux to be max.. for a given A and E.. the only way you can maximize it is cos theta... so what value of theta gives max value of cos theta?? similarly what value of theta gives the min value of cos theta??