As per my understanding, you are trying to find the solution of set of non-linear equations using Newton-Raphson method.
As the third equation given by you is not clear, I am assuming that the equations you are trying to solve are:
x^2 * y^2 - z^2=0.3;
x cos y − sin 2z = -0.3;
x + y*z = -1.1;
I have attached a code snippet which solves the system of non linear equations containing three variables using Newton Raphson method.
I have used it for the above stated set of equation, and attached the screen-shot of its implementation:
This uses the Function “Newton_Raphson” from below attached file exchange:
The function returns the solution of three equations in three variables using the Newton-Raphson method. The inputs are symbolic functions, initial guesses and number of iterations.
Refer to the instructions given in the above mentioned file exchange to get a clear understanding of its usage.
I hope it helps !
