Question: Cosine somehow change signs of core variables

February 10 2014 bredell 10
Maple

2

Hi.

I'm having a problem with this little guy "cos(Phi1(x)-psi)". When printed, it becomes "cos(-Phi1(x)+psi)", when Maple does not know what Phi1(x) or psi are. No matter what sign i set for psi, it will only display +psi when printed. Anyone know what causes this?

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