I teach lookup tables specifically for sine/cosine (we just use one with a phase shift and modulus) on the Gameboy Advance. The hardware has no floating point u

I teach lookup tables specifically for sine/cosine (we just use one with a phase shift and modulus) on the Gameboy Advance. The hardware has no floating point unit support, so we do it in 8.8 fixed point with 1-degree resolution. It turns out the BIOS on the hardware can do sine/cosine, but you have to do that via inline assembly (swi calls) and it's no faster than the simple lookup table. This is all just to get terms for the affine matrix when rotating sprites/backgrounds.