Rotating Graphics

[Kadar]

How do i rotate graphics perfectly i have a 32x32 image that i want rotated 10 degrees but it comes out all sloppy,
I think i read somewhere you need the exact angle to rotate it at but i dont know what it is..

im trying to make a turret that rotates to the player and i cant get the gfx rotated right i need one for every degree or every 10th degree.

Any help would be apreciated