Ok, new to the forum and taking my first real science credit physics course (I have taken one prior but it doesnt count towards the major). I'm in somewhat of a bind here as i just got a TI-89 titanium thinking that more was inherently better, im now regretting this decision. When i go to do a simple equation such as finding a projectiles velocity in the x direction on a plane, i would enter the equation 950cos(75), (final speed being 950m/s, and the angle being 75deg.) i get this: 475*(√(3)-1)*√(2)/2. Now, ive looked through the manual, and do believe i am on the proper settings. I have also had the professor take a look at it but he couldn't figure it out either. After some extensive googling i figured someone here could help me out.