Explain weird behavior of Solve
- To: MATHGROUP at christensen.cybernetics.net
- Subject: [mg638] Explain weird behavior of Solve
- From: REECE_D <REECE+_D%A1%Electromagnetic_Sciences at mcimail.com>
- Date: Mon, 3 Apr 95 12:49 EST
Can someone explain what is happening in the following example.
Solve[x^2 (2 l b-Sin[2 l b])/(4 b)==1, x]
-2 I Sqrt[b]
{x->-------------------------},...
Sqrt[-2 b l + Sin[2 b l]]
Solve[(x^2==a)/.Flatten[Solve[a (2 l b-Sin[2 l b])/(4 b)==1,a]],x]
-2 Sqrt[b]
{x->-------------------------},...
Sqrt[2 b l -Sin[2 b l]]
I want an answer sans I whenever possible. I'd like to use the simple
call in #1 but don't like the solution representation. Is there a way I
can force an answer like #2 or a rule I can apply that will always trade an
I in the numerator for a Sqrt[-1] in the denominator?
Thanks in advance,
Daryl