Jason Grout wrote:
> Scott Walck wrote:
>> The sage command
>>
>> plot(2*cos)
>>
>> produces a plot of 2*sin(x).  This seems like a bug.  This occurs in
>> sage 3.1.4 and on the web version.
>>
>> Note that
>>
>> plot(2*cos(x))
>>
>> works properly.  Also,
>>
>> plot(2*sin)
>>
>> appears to give the correct plot.
> 


Line 6860 of calculus.py defines the fast_float function for cos(x) to 
be math.sin.  That's the problem.  I'm posting a patch right now.

Jason


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