> This might seem waaay OT but there is a PIC in there somewhere.
> Can somebody please help this rusted brain:

> I've been given information as such:
> if x=0, y=0
> x=15, y=0.259
> 30, 0.5
> 45, 0.707
> 60, 0.866
> 75, 0.966
> 90, 1.000

> You will see that while X is linear, Y is not (Log??). With these
> information available, how would I calculate Y for all the other values
> of X?

This is a sine function. Y = sin(X). You can do it on your calculator or
look it up in a book of tables.

> I want to use it in a lookup table in the PIC.

Somewhere I've seen a application that does exactly this to generate a
pseudo-sine wave for audio testing.  If I can find it I'll post a pointer.





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