calculation of angles

Hilton Evans hfevans_nospam at ici.net
Wed Jan 5 21:08:19 EST 2000

"Mark" <gatfix at hotmail.com> wrote in message news:83d7hj$ih5$1 at nnrp1.deja.com...

> (a) why atan2(y,x) is preferred to atan(y/x);

    atan(y/x) offers no protection against x=0
Hilton Evans
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