Here is the question:
I have posted a link there to this thread so the OP can see my work.Could someone show me how to do this problem?
I don't understand anything about parabolas or hyperbolas and I need help. PLEASE show me how to do this
Find an equation for a cross-section of a parabolic microphone whose feedhorn is 9 inches long if the end of the feedhorn is placed at the origin.