Hi Dan,

I think Excel has an ACOS function.

Nigel


On Tuesday, March 26, 2002 3:46 PM, D Lloyd [SMTP:dan.lloyd@GB.ABB.COM] wrote:
> Hi,
>
> I need to implement a "resource and speed friendly" (yeah, right) acos
> function (not on a PIC). Essentially, I need to calculate acos(x) where 0
> <= x <= 1 and where x is the value of power factor to three decimal places
> (x is already multiplied by 1000 to give an integer).
>
> I've had a look around and found the obvious series expansion/look up
> solutions but does someone have a way of doing this via some other
> "advanced cleverness"?
>
> I notice Scott has all BUT the acos in the piclist archive - typical!
>
> Regards,
> Dan
>
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