1) It's "pi" not "pie"
2) It's "theta" not "fetta"
3) You have a ? (That's the best I can do with it.) What is that supposed to be? And your question then you have a "p"?
Edit: Wait. Is your "u" with a line through it supposed to be a ? That's the Greek letter "theta".
I still can't make any sense of your question.... Could you quote the exact wording of your question?
Edit II: Is your "p" supposed to be a ? Then are you looking at the polar coordinate ? But what's this about finding ?