quick poll - precalc sin & cos or perform every frame ?

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Dax Trajero

Hi, I'm new to all this programming business, and have a set of 4 sprites, each of which can move in any angle (eg. 0 deg, 11.25deg, 22.50deg, etc...)

Regardless of which method* I choose, I use

dx = cos(a)
dy = sin(a)

*My question is, is it best to precalc these values and put them in a data structure (array,etc...) so its less cpu itensive

or

Every frame, do I just do the COS & SIN calcs for each of the 4 sprites, and to hell with the cpu intensity ?

Thanks in advance,
-Dax