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Question: Graphing is off - Maple glitch?

Question:Graphing is off - Maple glitch?

Christopher2222 5805 Maple
plot graph
January 06 2009
0

plot (arccos(cos(x)),x);

At x=0, arccos(cos(x)) should be shown on the graph at (0,0),  As I zoom in I find that Maple draws it at closer to the point (.01,-.01) not at all at (0,0)

So how should I believe a graph if it's not shown properly?  Am I to use graphing as an approximation only.  Suppose I was to use the graphing answer in an exam or worse in a real life situation (of course I'm being a little silly, real life situations involve verification and double checking) but if I'm using Maple as a precise tool, should the graphs not also be displayed accurately?

Is this a maple glitch that needs to be fixed up?
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