Inverse of COS

Can anybody help me find ArcCos?

Regards,
uuq

Hello uug1,

In order to do this, you must use the taylor series..

Go to the bottom of this link... IT gives a LOT of info.

http://www.picbasic.co.uk/forum/show...ghlight=Taylor

Dwayne

Alternatively, look at the PROTON+ compiler.

This does true floating point calculations including trigonometry.

I tried with Taylor series but no good.
For angles less than 45 degrees, the code seem to work ok, but for larger angles the deviation is high.

I have decided to use interpolation with select.

Appreciate the help I got from this place.

You may also want to look here:
http://www.emesys.com/BS2math3.htm

Thanks languer for the article. I think it will help.