>>>>> "Boris" == Boris Veytsman <borisv@lk.net> writes:
>> From: Raymond Toy <toy at rtp>
>> Date: 25 Sep 2001 13:04:08 -0400
>>
>> I now have a final question. sn has these properties:
>>
>> sn(u/2)^2 = (1-cn(u))/(1+dn(u))
>>
>> sn(2*u) = 2*sn(u)*cn(u)*dn(u)/(1-m*sn(u)^4)
>>
>> How do I get maxima to understand this? However, I don't want this
>> applied all of the time, just like the corresponding trig functions.
>>
[solution snipped]
Very cool.
Much appreciated.
Ray