Anyway for anyone in the future that may come across this message and having the same problem, it was because I had defined PI as

const PI = 3.1415926535897932384626433832795;

when I should have done

const float PI = 3.1415926535897932384626433832795;

kieren, your response to this question was not productive at all. Why do you deserve to laugh in front of someone else who is trying to solve a problem that you have already solved? Although rotation should NOT have taken you "months" to figure out, at least your result might have helped him out.

Meanwhile, although you don't believe in sharing solutions, I see you ask questions on this board that are IN documentation. This at least is not.

Basically, you are a hypocrite, and if you want others to answer your questions in the future, you might as well return the favor every so often.

- Splat

I create a look-up table in the following manner:

for(int x =0; x <360; x++)
{
look_cos[x] = cos(x*(PI/180));
look_sin[x] = sin(x*(PI/180));
}

Later I "plot" some points (actually I am blitting an image but just using the left, top coordinate as the point that is being rotated) in the following manner (not optimized at all because I'm trying to keep it simple until it works):
For this example I just use 3 "steps" and am attempting to have them be just 1 degree appart but they aren't. They are WAY more than just 1 degree off (actually look something closer to 90 degrees apart). Any ideas why?

FYI - 166,165 that I use are the width and height of the image being "rotated"

XPos = 300 * look_cos[0] + (g_DisplayWidth / 2 - (166 / 2));
YPos = 300 * look_sin[0] + (g_DisplayHeight / 2 - (165 / 2));

SetRect(&OutputRect,XPos, YPos, XPos + 166, YPos + 165);
g_pDDSBack->Blt(&OutputRect, g_pDDSSprite, NULL, DDBLT_WAIT | DDBLT_KEYSRC, &ddbltfx);

XPos = 300 * look_cos[1] + (g_DisplayWidth / 2 - (166 / 2));
YPos = 300 * look_sin[1] + (g_DisplayHeight / 2 - (165 / 2));

SetRect(&OutputRect,XPos, YPos, XPos + 166, YPos + 165);
g_pDDSBack->Blt(&OutputRect, g_pDDSSprite, NULL, DDBLT_WAIT | DDBLT_KEYSRC, &ddbltfx);

XPos = 300 * look_cos[2] + (g_DisplayWidth / 2 - (166 / 2));
YPos = 300 * look_sin[2] + (g_DisplayHeight / 2 - (165 / 2));

SetRect(&OutputRect,XPos, YPos, XPos + 166, YPos + 165);
g_pDDSBack->Blt(&OutputRect, g_pDDSSprite, NULL, DDBLT_WAIT | DDBLT_KEYSRC, &ddbltfx);