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Topic: How can I solve transcendental equation
Replies: 1   Last Post: Nov 4, 2013 9:46 AM

 Messages: [ Previous | Next ]
 Rizwan Posts: 1 Registered: 11/4/13
How can I solve transcendental equation
Posted: Nov 4, 2013 9:14 AM

Hello,

I am trying to solve transcendental equation which is given in code and want to find the value of beta but I am getting error and don't know how to correct it. Please someone correct it for me.

Thanks.

Code:

n1=1.77;
n2=1.45;
d=1e-6;
lambda = 1e-6;
ko = 2*pi/lambda;
A=(ko*n1)^2;
B=(ko*n2)^2;
s = 'sqrt(A-beta^2)*(d/2)*tan(sqrt(A-beta^2)*d/2)=sqrt(beta^2-B)*(d/2)';
solve (s);

Error:

Error using solve>processString (line 337)
' sqrt(A-beta^2)*(d/2)*tan(sqrt(A-beta^2)*d/2)=sqrt(beta^2-B)*(d/2) ' is not
a valid expression or equation.

Error in solve>getEqns (line 267)
eqns = processString(eqns, v, vc);

Error in solve (line 150)
[eqns,vars,options] = getEqns(varargin{:});

Error in transcendetal (line 9)
solve (s);

Date Subject Author
11/4/13 Rizwan
11/4/13 Torsten