Answer:
Prayer is communication with God, so logically you must have faith in His existence to sincerely pray. It is possible to speak prayer like words with no faith, but this is not really prayer. the prayer is oh my god,i firmly believe that you are one god in there divine persons ,father,son,and holy spirit i believe that your divine son became man,and die for our sins, and that he will come to judge the living and the dead .beleive this and all the truths the holy catholic church teaches because you have revealed them, who can natheir desieve nor be desieved