math module broken?

Dan Bishop danb_83 at yahoo.com
Sat Jul 24 08:00:18 CEST 2004


danb_83 at yahoo.com (Dan Bishop) wrote in message news:<ad052e5c.0407231555.53f3ea11 at posting.google.com>...
> Helmut Jarausch <jarausch at igpm.rwth-aachen.de> wrote in message news:<4100BE72.1040405 at igpm.rwth-aachen.de>...
> ...
> > If your input is in degrees, define
> > 
> > def mysin(x)
> >      return math.sin(x/pi*180) # 1 degree = 180/pi radians (don's use  x/180*pi)
> >
> > now
> > print mysin(32)  gives 0.529919264233
> 
> x/180*pi _is_ correct.  Your formula gives mysin(32) = -0.9408618465702292.
> 
> Btw, another way to write this is:
> 
> def mysin(x):
>    return math.sin(math.radians(x))

Even better:

def mysin(x):
   return math.sin(math.radians(x % 360))



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