How to plot two variables function

Question:How to plot two variables function

Posted: primemath 42 Product: Maple

December 18 2008

I want plot this abs error function

with two variable, I set

x:=-0..2;

plot(abs(sin(x*w)-cos(x*w),w=-2..2));

But it is not displsy. Why ,Can you tell me about how to

plot the figure.

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