I am currently in 9th grade and am a programmer, however trigonometry is next year... You could probably consider the engine of Asteroids "basic physics", so will post it here... Sorry if this is in the wrong section. I am creating the classic arcade game Asteroids with XNA Game Studio by Microsoft, and can't figure out how I would make the ship thrust in one direction...I assume this uses trig, but I would like to complete this game before next year :) Any help on finding tutorials, a basic rundown on what I might need to learn (I am willing to learn some basic trig. before next year), or anything else would be greatly appreciated. Thanks!