alphabetical order defies analytical ability
- To: mathgroup at yoda.physics.unc.edu
- Subject: alphabetical order defies analytical ability
- From: Leaf Turner <tleaf at leaf.lanl.gov>
- Date: Tue, 13 Apr 93 15:01:25 -0600
It seems that the order of symbols defeats the Solve algorithm. If I
take a denominator of e-d, Solve fails. If I take the order d-e,
Solve works:
Solve[a-ArcSin[ x/(e-d)]==0,x]
Solve::solex: Solve "can't handle one of the exponents" [sic!].
x
Solve[a - ArcSin[------] == 0, x]
-d + e
Solve[a-ArcSin[ x/(d-e)]==0,x]
{{x -> (d - e) Sin[a]}}
----------------------------
Similarly, if I take r1-r2 in the denominator, Solve works. If I
take r2-r1 in the denominator, Solve "can't handle one of the
exponents" [sic!].
Solve[a-ArcSin[ x/(r1-r2)]==0,x]
{{x -> (r1 - r2) Sin[a]}}
Solve[a-ArcSin[ x/(r2-r1)]==0,x]
Solve::solex: Solve can't handle one of the exponents.
x
Solve[a - ArcSin[--------] == 0, x]
-r1 + r2