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Question: Invalid arguments on plotting graph

Question:Invalid arguments on plotting graph

Sofey 10
complexplot
April 29 2015
1

Can somebody help me on this problem?

``

> 

restart
> 

y := x^2-x*(2*cos(theta)-m^2+m^2*((4*1^2*cos(1)^2*(1^2*cos(1)^2))*1^2*cos(1)^2*(1^2*cos(1)^2))/(epsilon*((1^2*cos(1)^2*(1^2*cos(1)^2))*(1^2*cos(1)^2+1^2*cos(1)^2)+(1^2*cos(1)^2*(1^2*cos(1)^2))*(1^2*cos(1)^2+1^2*cos(1)^2))))+1;

x^2-x*(2*cos(theta)-m^2+m^2*cos(1)^2/epsilon)+1

 (1)
> 

subs(m = 1-exp(-m), %);

x^2-x*(2*cos(theta)-(1-exp(-m))^2+(1-exp(-m))^2*cos(1)^2/epsilon)+1

 (2)
> 

subs(m = 0.1e-2, %);

x^2-x*(2*cos(theta)-(1-exp(-0.1e-2))^2+(1-exp(-0.1e-2))^2*cos(1)^2/epsilon)+1

 (3)
> 

subs(epsilon = .85214520, %);

x^2-x*(2*cos(theta)-0.9990006498e-6+0.1172336182e-5*cos(1)^2)+1

 (4)
> 

subs(theta = 2*Pi, %);

x^2-x*(2*cos(2*Pi)-0.9990006498e-6+0.1172336182e-5*cos(1)^2)+1

 (5)
> 

ans := solve(%, x);

.9999996716-0.8104096482e-3*I, .9999996716+0.8104096482e-3*I

 (6)
> 

m := ans[1];

.9999996716-0.8104096482e-3*I

 (7)
> 

n := ans[2];

.9999996716+0.8104096482e-3*I

 (8)
> 

with(plots):
> 

complexplot({r1, r2}, numpoints = 100, color = green, filled = true, title = "Stability Region")

Error, (in plots/complexplot) invalid arguments

  
> 

``

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