Yes, we can.
For microchip.. seems the wrong forum

The easy way for every function is to do a table with the result.(easy but bigger)

If not, try a cutted taylor serial of your function

Which accurance do you need?
In wich range of values?
Floating point?
Fixed point?
...

Please explain more your problem... and don't type in CAPITALS SEEMS YOU ARE SHOUTING!!

Regards