G'day CaptianBlack

I found the section 4.3.97 from Abramowitz and Stegun.

However i am still haing dificalty arriving at the right answer! :confused:

I have done several calculations for sine using

Using the number set shown in the paper and i get a correct answer every time. :-)

However when i try to use the nested form below i can't get the correct answer. Of the three examples i tried the answer was only good for 1-2 decimal places..

I think it's the way i do the equasion so let me show you what i did and you can tell me where i went wrong.

For example lets do Sine(x) for 25.55 deg.

25.55 DEG = RAD 0.445931623

So x=RAD

I have re-written the equasion to look like

The answer i get is 0.423992833

When the correct answer is 0.431298587

Am i correct in re-arranging the equasion this way or is this why i get an incorrect answer?

Cheers

Leeroy