fmincon examples added

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diff --git a/tests/general_tests/fmincon/fmincon_logical6.sce b/tests/general_tests/fmincon/fmincon_logical6.sce
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+// Example with objective function using sinusoidal functions
+
+function y=fun(x)
+y=sin(x(1))+cos(x(2));
+endfunction
+
+x0 = [1,2];
+A=[1,1 ; 1,1/4 ; 1,-1 ; -1/4,-1 ; -1,-1 ; -1,1];
+b=[2;1;2;1;-1;2];
+
+//Output
+//Optimal Solution Found.
+// hessian  =
+// 
+//    0.2129952    0.         
+//    0.           0.2129198  
+// gradient  =
+// 
+//    0.9770613  - 0.9770613  
+// lambda  =
+// 
+//   lower: [0,0]
+//   upper: [0,0]
+//   ineqlin: [2.270D-08,1.202D-08,2.272D-09,3.316D-09,1.571D-08,0.9770613]
+//   eqlin: [0x0 constant]
+//   ineqnonlin: [0x0 constant]
+//   eqnonlin: [0x0 constant]
+// output  =
+// 
+//   Iterations: 12
+//   Cpu_Time: 0.132
+//   Objective_Evaluation: 15
+//   Dual_Infeasibility: 7.674D-10
+// exitflag  =
+// 
+//  0  
+// fopt  =
+// 
+//  - 0.4259168  
+// xopt  =
+// 
+//  - 0.2146019  
+//    1.7853981 
+
+[xopt,fopt,exitflag,output,lambda,gradient,hessian] = fmincon (fun, x0, A, b)