title: how to solve non linear system of equations involving trigonometric functions in MATLAB
body: <p>how to i find the values of b,k1,k3 from the following equations in MATLAB</p>
  
  <pre><code>     cos(2*b)- k3 +(2*k1*sin(b))=0
       cos((2*b)+t1-p1)-k3-(k1*(sin(p1-b)-sin(t1+b)))=0
       cos((2*b)+t2-p2)-k3-k1*(sin(p2-b)-sin(t2+b))=0
  </code></pre>
  
  <p>where p1,p2,t1,t2 are known values</p>