Seems like this is a great feat for your friend to achive. You should submit your friend's idea/solution to your math teachers/professors and to various websites such as this one for verification of data and correctness. Since I know no squat about trisecting an angle, don't ask me. But just get it out to many people and get their feedbacks. Even though I doubt that your friend has done the impossible, there may be a chance that something big might happen. But just get this to credible websites and people you know, most importantly to mathematical profession people, like your math teacher. I would like to hear from you about this later! See YA!