| Author |
Comment/Response |
Bill Simpson
|
 07/30/12 11:37am
This doesn't answer why SolveAlways isn't working for you in this particular case, but for this particular problem
Simplify[Reduce[(a+b)(1-r^2)+c r Sqrt[1-r^2]==0, {r}]]
instantly returns
(a+b==0 and (c==0 or 1+r==0 or r==0 or r==1))
or two other solutions involving complex numbers.
Sometimes in Mathematica you can spend hours or days fighting with it trying to get it to do something or you can just give up on that and use another method.
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