Question: Why Maple doesn´t give two solutions

Hi every one,

I am using Maple 7 because I am running Windows XP

I believe this equation:


> solve( 1.15=exp(-xi*Pi/(sqrt(1-xi^2))), xi);


has two solutions: xi=+0.4444364945e-1 and xi=-0.4444364945e-1

but Maple only gives -0.4444364945e-1


Why?? And how can I get the two solutions?? Thanks before hand by your comments.

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