Hallo ALL, I tried to solve an trigonometry equation on my TI92 (e.g. solve (sin(x)=0,x) ) and the output was x= @n3*PI. What does this mean. I guess it is the period of the resolution (Sin(x)=0 at 0, PI, 2PI ...) But for what stand for the @ and the n3? Please hurry up with anwsers- my examn is in 2 weeks... :-)) .jo! Joachim